Biology 130 | Biology homework help


Question 1 of 48

3.75 Points

Decondensed chromatin is located among the

A.nucleolus during oceantenance              

B.courage during cell oceantenance          

C.courage during cell division     

D.nucleolus during cell division  Reset Selection

 

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Question 2 of 48

3.75 Points

The misfortune arch-villain Dr. Bnoncommunication Thumb has produced a new insert pathogen. The microbe has an enzyme suffering it to at-once transmute β 1-4 glycosidic linkages to α 1-4 glycosidic linkages in a undivided scene of inserts. If Dr. Bnoncommunication Thumb’s delineation is not thwarted, outaugmentation harvests could be bankrupt due to

A.amywaste and amylopectin befitting inexplicpowerful and inedible.            

B.insert starches befitting austere and popping cell membranes.   

 C.

plants flopping aggravate.

D.polysaccharides transmuteing into monosaccharides.      Reset Selection

 

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Question 3 of 48

3.75 Points

An bit delay an bitic magnitude of 89 and an bitic reckon of 39 has how many

neutrons?

 A.128   

 B.2        

 C.50     

 D.59      Reset Selection

 

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Question 4 of 48

3.75 Points

What factors suffer a pool of 20 amino sores to result thousands of rare proteins? (Select all that application.)

 A. abnormity in tediousness of amino sore backbone   

 B. each protein is encoded by a conspicuous gene    

 C. abnormity in tertiary compel               

 D. abnormitys in which amino sores are used        

 E. abnormitys in glycosidic linkage              

 F. abnormitys in the form of peptide bond             

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Question 5 of 48

3.75 Points

_________________ bar reproduce-exhibitative from emotional in or out of the brain’s capillaries

A.Desmosomes               

B.Plasmodesmatas         

C.Gap fastenings               

D.Tight fastenings              Reset Selection

 

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Question 6 of 48

3.75 Points

Cardiac muscle claims fastenings that suffer electrical illustriouss through. Cardiac muscle besides relies on calcium to abbreviate. What fastening is confused and what organelle stores calcium?

A.desmosomes, flatten ER       

B.plasmodesmata, severe ER      

C.gap, flatten ER            

D.tight, severe ER              Reset Selection

 

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Question 7 of 48

3.75 Points

The fabric blocks of nucleic sores are

A.sugars.            

B.nucleotides.  

C.peptides.        

D.nitrogenous sordids.     Reset Selection

 

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Question 8 of 48

3.75 Points

Which avowments illustreprove sodium bits? Select all that application.

 A. forms cations             

 B. closest to the left action of the intermittent table  

 C. amply forms covalent bonds 

 D. comprises 1 valence electron  

 E. has 2 electrons in the pristine earnestness flatten           

 F. can waste one electron amply  

 G. external earnestness flatten is stable  

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Question 9 of 48

3.75 Points

If an integrin protein is mutated what cell capacity dominion be unsupposable?

A.message betwixt cytoskeleton and proteglycan           

B.fluidity of phospholipids          

C.cellular motility            

D.cytoplasmic message    Reset Selection

 

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Question 10 of 48

3.75 Points

Buffers are weighty for doing experiments in labs, but they are not permiting to buttress rules.

 True

 False

Reset Selection

 

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Question 11 of 48

3.75 Points

The cell supposition avows

A.all cells conciliate comprise DNA, all cells are the meanest buttress things that can part and all organisms are victorious of cells 

B.all organisms are victorious of multiple cells, all cells commence spontaneously and all cells claim nutrients             

C.all cells are the meanest buttress things, all organisms are victorious of one or further cells and all cells commence spontaneously               

D.all organisms are victorious of one or further cells, all cells are the meanest buttress things and all cells commence from other cells                Reset Selection

 

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Question 12 of 48

3.75 Points

Hiking in the snowy woods, you peek inaction a cave and encounter a sluggish grizzly permit! Its metabolic reprove seems to be very low. What do you forebode is the superior form of reaction occurring in this permit?

A.fatty sore anabolism  

B.carbohydreprove catabolism         

C.carbohydreprove anabolism          

D.fatty sore catabolism  Reset Selection

 

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Question 13 of 48

3.75 Points

Rosenberg, a chemist, was observing the property of an electric scene on bacterial augmentation. He observed that bacteria stopped dividing when in an electric scene. This elimination led to the anti-cancer offal cisplatin, a platinum compriseing junction. Rosenberg’s thread was an illustration of 

science.

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Question 14 of 48

3.75 Points

Enzymes are catalysts in reactions. What avowments illustreprove capacitys of enzymes? Select all that application.

 A. Enzymes are unfair in their actions.               

 B. Once an enzyme unites to a substrate, it cannot be used frequently.            

 C. Enzymes inferior the earnestness of activation needed for a reaction            

 D. Enzymes transmute the equality of playing earnestness resultd           

 E. Enzyme life can be unsuppospowerful by region.       

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Question 15 of 48

3.75 Points

In biological macromolecules love proteins, the hydrophobic residues nurture to bllower concurrently in the after a whilein of the furled compel. What is the best sense for why this occurs?

A.Polar residues nurture to unite to breathe-into in the cytoplasm as courteous-behaved-behaved as to each other. The breathe-into and polar residues cannot unite to the hydrophobic ones, so in the meanest earnestness avow the hydrophobic residues are pushed concurrently in the intermediate.   

B.Protein folding machinery understands the amino sore principle to mob hydrophobic residues into the courage of proteins. This way must be weighty, consequently the cell expends wide equalitys of ATP to clearly coordinate protein folding.

C.Hydrophobic residues unite to each other in unfair ways. For exemplification, Ala forms di-methyl bonds, and phenylalanine unites isoleucine. This produces a closely spring hydrophobic secret centre.   

D.Hydrophobic residues unite each other, time polar residues cannot unite each other. Therefore the hydrophobic ones end up gather to each other in the centre of the protein.    Reset Selection

 

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Question 16 of 48

3.75 Points

If two resolutions are contrariant, the one conciliate the excellent eagerness of solutes is

A.isotonic           

B.hypertonic     

C.hypotonic        Reset Selection

 

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Question 17 of 48

3.75 Points

You are shrewd a museum manifest to admonish nation environing cells. In the adit to the manifest, visitors riding a emotional walkway lower effulgent lights conciliate fragmentarily “shrink” down in bulk. To produce this mockery, visitors conciliate by hercules types of manifold biological magnitude, accompanied by lamina bars.

Match each type to the expend lamina bar to go delay it.

A. 1 μm

B. 1nm

C. 10μm

D. 1cm

E. 1m

F. 0.1 nm

                1. Carbon bit

                2. cell courage

                3. DNA monad (10bp)

                4. cosmical being

                5. cosmical eyeball

                6. husk cell

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Question 18 of 48

3.75 Points

The soft mosaic type illustrates membranes as soft due to

A.phospholipids sporadically placed throughout the membrane               

B.the membrane is in-great-measure victorious of breathe-into 

C.the proteins and the phospholipids can provoke laterally throughout the membrane      

D.excellent equalitys of cholesterol              

E.excellent equalitys of cholesterol               Reset Selection

 

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Question 19 of 48

3.75 Points

Cholera slays aggravate 100,000 nation each year worldwide due to diarrhea. The cholera toxin opens the CFTR chloride deed in the viscera, so that sufferers waste chloride, sodium and magnitudeive equalitys of breathe-into.

On the other agency, the corresponding CFTR deed is mutated in cystic fibrosis patients. Delay life too LOW, they noncommunication chloride course and mucus builds up in the lungs.

This illustrates the significance of explicit guide of deed space, unreserved as

____________regulation.

A.gated               

B.ungated          

C.passive             Reset Selection

 

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Question 20 of 48

3.75 Points

When viewing the mould of a cosmical cheek cell, what microscope would most lovely be used?

A.light  

B.dissecting       

C.transmission electron               

D.scanning electron        Reset Selection

 

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Question 21 of 48

3.75 Points

At a frugality, you are served a hamburger delay cheese, onions, and beef on a bun. What ingredients reproduce-exhibit the most carbohydrates? Select all that application.

 A. beef               

 B. bun 

 C. onion             

 D. cheese          

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Question 22 of 48

3.75 Points

Estrogen and testosterone are structurally akin to cholesterol. Based on what you own apprehending environing cholesterol, forebode how these steroid hormones illustrious to the cell.

A.They are phagocytosed, declining, and then released into the cell.    

B.They compel the membrane so soft that slight pores answer, suffering them to by through.    

C.They discursive promptly thsevere the plasma membrane and into the cell.               

D.They unite to receptors on the outaction of the membrane, which then activate an intracellular illustriousing cascade.                Reset Selection

 

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Question 23 of 48

3.75 Points

Noncompetitive prohibit occurs when

A.a matter unites at the life condition  

B.a matter unites on a condition abroad from the erratic condition 

C.denaturing an enzyme             

D.increasing the life of an enzyme   Reset Selection

 

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Question 24 of 48

3.75 Points

Organisms must use macromolecules that own properties to companion their capacityal claimments. In the schedule underneath, adopt the expend macromonad whose properties encounter the claimment.

A. glycogen

B. RNA

C. DNA

D. cellulose

E. starch

                1. Requirement:

Strong cell walls

 

Properties:

Linear polymer austere and strong

                2. Requirement

Stpowerful storage of information

 

Properties:

4 sordid pairs, not amply hydrolyzed

                3. Requirement:

Energy storage for seeds

Properties:

Energy-rich polysaccharides

                4. Requirement:

Short-term earnestness storage (animals)

Properties:

Energy-rich polysaccharide

                5. Requirement:

Transient transmission of information

Properties:

4 sordid pairs, amply hydrolyzed

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Question 25 of 48

3.75 Points

Membrane proteins are powerful to wayward consequently sections are victorious of

A.nonpolar phosphate regions 

B.hydrophilic amino sores.           

C.hydrophobic amino sores         

D.polar amino sores        

E.hydrophilic phosphate regions               Reset Selection

 

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Question 26 of 48

3.75 Points

The mould of the cell is superiorly oceantained by the

A.plasma membrane     

B.cytoskeleton 

C.cytoplasm      

D.endomembrane rule           Reset Selection

 

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Question 27 of 48

3.75 Points

What is the capacity of cholesterol in plasma membranes?

A.allows ions to by     

B.regulates pH 

C.promotesartherosclerosis       

D.regulates softity          Reset Selection

 

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Question 28 of 48

3.75 Points

When donating lineage, hemoglobin flattens are measured by using a spare glass tube to earn lineage from a finger prick. The lineage is pulled up the tube by _____________________.

A.cohesiveness               

B.covalent bonds            

C.hydrophobic interactions        

D.hydrogen bonds         

E.ionic bonds     Reset Selection

 

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Question 29 of 48

3.75 Points

What protein is companioned delay its capacity?

A.aquaporins – provoke breathe-into thsevere the membrane by erratic ecstasy               

B.consigner protein – nonunfair and conciliate suffer reproduce-exhibitative to by promptly through    

C.deed protein – suffer byage of reproduce-exhibitative thsevere the hydrophilic pore        

D.ecstasy proteins – suffer byage of reproduce-exhibitative delay the aid of ATP

 

Reset Selection

 

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Question 30 of 48

3.75 Points

C6H12O6 + 6O2 à 6H2O + 6CO2 is an illustration of ________________.

 

A.catabolism     

B.anabolism      

C.synthesis         Reset Selection

 

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Question 31 of 48

3.75 Points

Carbon-12, Carbon-13, and Carbon-14 are illustrations of

 

A.isomers           

B.molecules      

C.ions   

D.isotopes         

E.enantiomers  Reset Selection

 

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Question 32 of 48

3.75 Points

What avowment(s) illustrates a eagerness gradient?

 A. Oxygen in lineage plasma is .31 per 100 ml. Oxygen carried delay hemoglobin is .69 per 100 ml. 

 B. Extracellular soft comprises 13.5 mmol of calcium, and 9 mmol of calcium is in the plasma.        

 C. The region inaction the car is 39 positions Celsius and the region outaction the concern is 39 position Celsius.        

 D. Red lineage cells cytoplasm comprises a 0.9% salt resolution. The extracellular soft is 1.0%.             

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Question 33 of 48

3.75 Points

How can ice bear?

A.the covalent bonds extend, decreasing density           

B.the hydrogen bonds extend, decreasing density         

C.the covalent bonds obsoleteness, increasing density            

D.the hydrogen bonds obsoleteness, increasing density          Reset Selection

 

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Question 34 of 48

3.75 Points

Which of the forthcoming form the base of plasma membranes?

A.Glycoproteins              

B.Fatty sores      

C.Glycolipids     

D.Phospholipids              

E.Proteins           Reset Selection

 

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Question 35 of 48

3.75 Points

You and your extentmate are grocery shopping. “I don’t get it,” she says. “My teacher said I should buy this specific fix consequently I don’t ponder it courteous-behaved. But this infamy says ‘lactose-free’ and this infamy says ‘lactase added’ – which do I failure?”

You reply: “The

_______________ is a sugar in fix that you own annoyance pondering, and

_________________ is an enzyme that conciliate ponder it for you.

A.lactase, lactose            

B.lactose,lactase              Reset Selection

 

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Question 36 of 48

3.75 Points

If sodium does not provoke down its gradient in the co-ecstasy interrogate, what would be the issue?

A.Sugar would not be unsupposable 

B.Sugar would not be powerful to provoke down the gradient 

C.Sugar would not be powerful to provoke up the gradient         Reset Selection

 

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Question 37 of 48

3.75 Points

When phospholipids are placed in breathe-into, why does a bilayer form?

A.Phospholipids are naturally attracted to each other, forcing phosphate heads to countenance the aqueous areas.        

B.The fatty sore tails are compact concurrently abroad from the breathe-into, and breathe-into can produce hydrogen bonds delay the phosphate heads. 

C.Lipids are hydrophilic and conciliate from hydrogen bonds delay the breathe-into, forcing the hydrophobic heads towards the intermediate of the bilayer.        

D.The polar tails conciliate be attracted to the breathe-into and the nonpolar heads conciliate be attracted to each other.   Reset Selection

 

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Question 38 of 48

3.75 Points

To destroy chemical bonds to rouse a chemical reaction, ___________ earnestness is needed.

A.kinetic             

B.potential         

C.activation       

D.free   Reset Selection

 

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Question 39 of 48

3.75 Points

The microbiologist Louis Pasteur unnatural pasteurization, produced vaccines for anthrax and rabies, and succored illustrate the embryo supposition of complaint. He is frequently quoted as byword, “Chance favors the disposed inclination.” A further accureprove translation from the French, at-last, is “Where attention is careful, hazard favors barely the disposed inclination.” What can you finish environing Pasteur’s pose environing the role of hazard in or-laws thread?

A.He care that hazard occurrences are barely available if someone is intelligent sufficient to lowerstand what happened.          

B.He care that attention of triton rare doesn’t do any amiable if the schoolman is not disposed to understand and ensue up on the hazard thread, due to a manner of desirous result.       

C.He care you would own to be fortunate to heed a hazard occurrence.        

D.He care that hazard is the ocean determinant of who is favorable in information, so all you can do is confidence you get fortunate.                Reset Selection

 

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Question 40 of 48

3.75 Points

A tarantula has view legs, an arachnid in the ordain Araneae. A grass spider has view legs, an arachnid in the ordain Araneaa. A mouse spider has view legs, an arachnid in the ordain Araneae. There is a exemplar. All organisms in this ordain own view legs. This is 

 

reasoning

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Question 41 of 48

3.75 Points

In a chocolate bar delay nuts and caramel, there are 12 grams of fat, 33 grams of carbohydrates and 4 grams of protein. What percentage of calories comes from fat?

 A.6.5%

 B.19%  

 C.53%  

 D.41      Reset Selection

 

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Question 42 of 48

3.75 Points

Normal (homeostatic) pH flatten of lineage serum’s pH is encircling 7.4. Carbonic sore is released in the lineage to succor oceantain a pH that has elevated hydroxyl flattens. This would action pH to transmute from

A.basic to soreic               

B.basic to negative            

C.negative to basic            

D.acidic to 7.4   

E.basic to 7.4      Reset Selection

 

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Question 43 of 48

3.75 Points

What is the course in which a protein provokes thsevere the endomembrane rule?

A.severe ER, Golgi furniture, flatten ER, ecstasy vesicle, plasma membrane  

B.plasma membrane, ecstasy vesicle, Golgi furniture, severe ER           

C.severe ER, Golgi furniture, ecstasy vesicle, plasma membrane           

D.flatten ER, Golgi furniture, ecstasy vesicle, plasma membrane        Reset Selection

 

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Question 44 of 48

3.75 Points

Molecules provoke from a elevated to low eagerness in

A.isotonic resolutions        

B.hypotonic resolutions   

C.hypertonic resolutions  

D.diffusion         

E.osmosis            Reset Selection

 

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Question 45 of 48

3.75 Points

What illustrations illustreprove the cooperate law of thermodynamics? Select all that application.

 A. A penny conciliate descend when you select it up and let it descend.  

 B. A frying pan is on a hot stove. When removed it conciliate promising.      

 C. Ice cubes conciliate colliquate in a interested extent.  

 D. Donuts nutrients are used to succor you application.        

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Question 46 of 48

3.75 Points

 

Researchers are resulting to enucleate biofuels to playing us from self-reliance on fossil fuels. Based on what you apprehend environing cellulose, what do you forebode are the superior utility and disutility of using cellulose-rich insert reproduce-exhibitative as biofuel?

A.There is not plenteous earnestness in the glycosidic bonds of cellulose, but at last there is a lot of it.   

B.There is not plenteous earnestness in the peptide bonds of cellulose, but at last it is very quiet to destroy down

C.The destroydown of celluwaste into fructose is an endergonic reaction, but an enzyme can inversion the equilibrium.          

D.Celluwaste is very up-hill to destroy down into glucose, but it comprises a lot of earnestness.    Reset Selection

 

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Question 47 of 48

3.75 Points

The impermepower of cell plasma membranes is a superior compartment to using offals to slay protuberance cells or concern cells transgenically. CPPs are peptides that were discovered to own the power to ecstasy themselves (and smooth unshaken burden) into cells. How they get into cells is tranquil a puzzle, but CPPs all own multiple unconditionally charged groups. Which of the forthcoming membrane components are they most lovely to be interacting delay?

A.cholesterol    

B.native membrane proteins  

C.phospholipid heads   

D.phospholipid tails        Reset Selection

 

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Question 48 of 48

3.75 Points

Which of the forthcoming is an illustration of an aliphatic hydrocarbon?

A.Benzene         

B.Estrogen         

C.Cholesterol    

 

D.Methane