Hydrogenated vegetable oil is the primary ingredient in margarine. How does hydrogenated vegetable oil differ from nonhydrogenated vegetable oil?

A) Hydrogenated vegetable oil has a reduced melting point than nonhydrogenated vegetable oil.

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B) Hydrogenated vegetable oil is solid at room temperature, whereas nonhydrogenated vegetable oil is liquid.

C) Hydrogenated vegetable oil has actually even more kinks in its fatty acid chains than does nonhydrogenated vegetable oil.

D) Hydrogenated vegetable oil includes more cis fatty acids than nonhydrogenated vegetable oil


B


4

 Which of the following statements regarding saturated fatty acids is true?

A) They are the predominant fatty acid in corn oil.

B) They have actually double bonds between the carbon atoms of the fatty acids.

C) They are the primary molecules in lard and also butter.

D) They are commonly liquid at room temperature.

E) They are normally produced by plants.


C


5

Large organic molecules are primarily synthesized by polymerization of a couple of types of straightforward subunits. Which of the complying with is an exemption to this statement?

A) a steroid

B) cellulose

C) DNA

D) an enzyme


 steroid


6

Which of the complying with big organic molecules will self-assemble right into a bilayer when mixed via water?

A) proteins

B) triacylglycerols

C) cellulose

D) phospholipids


Phospholipid


7

Why are the vertebprice sex hormones estradiol and testosterone considered to be lipids?

A) They are necessary components of cell membranes.

B) Their carbon skeleloads are composed of generally C–C and also C–H bonds.

C) They are made of fatty acids.

D) They are hydrophilic compounds.


their carbon skeletons are created of mainly C-C and also C-H bonds


8

Which of the adhering to molecules lacks amino acids?

A) hemoglobin

B) insulin

C) antibodies

D) spider silk

E) cholesterol


Chlolesterol


9

There are 20 various amino acids. What makes one amino acid different from another?

A) different side chains (R groups) attached to the carboxyl carbon

B) different side chains (R groups) attached to the amino groups

C) different side chains (R groups) attached to an α carbon

D) various asymmetric carbons


Different side chains attached to an α carbon


10

Which bonds are produced in the time of the formation of the main framework of a protein?

A) disulfide bonds

B) hydrogen bonds

C) peptide bonds

D) phosphodiester bonds


Peptide bonds


11

Which bonds maintain the main framework of a protein?

A) disulfide bonds

B) hydrogen bonds

C) ionic bonds

D) peptide bonds


Peptide bonds


12

What maintains the second framework of a protein?

A) peptide bonds between adjacent amino acids

B) hydrogen bonds in between the amino team of one peptide bond and the carboxyl group of one more peptide bond

C) disulfide bonds in between the amino team of one peptide bond and also the R group of an additional amino acid

D) hydrogen bonds in between the carboxyl group of one peptide bond and the R team of another amino acid


hydrogen bonds in between the amino team of one peptide bond and also the carboxyl group of an additional peptide bond


13

Which kind of interactivity stabilizes the α helix and also the β pleated sheet frameworks of proteins?

A) hydrophobic interactions

B) ionic bonds

C) hydrogen bonds

D) peptide bonds


Hydrogen bonds


14

The α helix and also β pleated sheet are examples of which level of protein structure?

A) primary

B) secondary

C) tertiary

D) quaternary

E) main, second, tertiary, and also quaternary


Secondary


15

Lactase is an enzyme written of a single polypeptide that hydrolyzes the disaccharide lactose to create monosaccharides. The optimal pH for lactase activity is 6. Transfer of lactase to pH 5 outcomes in a comprehensive decrease in enzyme activity, most likely as a result of the disruption of

A) only the primary framework of the enzyme.

B) the major and secondary structure of the enzyme.

C) the additional and also tertiary structure of the enzyme.

D) the additional, tertiary, and also quaternary framework of the enzyme


the secondary and tertiary framework of the enzyme.

 

Polypetide forms with a heydration reaction 

major and tertiary structures are held together by 


16

Collagen is a protein made of 3 similar polypeptides written mainly of α helix framework. The α helix is an instance of

A) additional framework stabilized by covalent bonds.

B) secondary structure stabilized by hydrogen bonds.

C) additional structure stabilized by ionic bonds.

D) tertiary framework stabilized by covalent bonds.

E) tertiary framework stabilized by hydrogen bonds.


 secondary structure stabilized by hydrogen bonds.


17

The tertiary structure of a polypeptide is the

A) straight sequence of amino acids in a polypeptide.

B) localized area of a polypeptide chain that forms an α helix or β pleated sheet.

C) all at once three-dimensional form of a completely folded polypeptide.

D) as a whole three-dimensional form of a protein written of even more than one polypeptide.


in its entirety three-dimensional form of a fully folded polypeptide.


18

A disulfide bridge is an instance of which kind of bond?

A) ionic bond between R groups

B) hydrophobic interaction between R groups

C) hydrogen bond in between R groups

D) covalent bond between R groups


D) covalent bond between R groups

*

19

Interactions in between the side chains (R groups) in a polypeptide are a lot of important in stabilizing which of the following?

A) main structure

B) second structure

C) tertiary structure

D) quaternary structure


D) quaternary structure

 

 

2 polypetide chains in a quatery structure


20

The side chain (R group) of the amino acid serine is –CH2–OH. The side chain of the amino acid leucine is –CH2–CH–(CH3)2. Wright here would you suppose to discover these amino acids in a globular protein in aqueous solution?

A) Serine would certainly be on the exterior, and also leucine would certainly be in the inner of the globular protein.

B) Serine would be in the internal, and also leucine would be on the exterior of the globular protein.

C) Both serine and also leucine would certainly be in the inner of the globular protein.

D) Both serine and leucine would be on the exterior of the globular protein.


Serine would be on the exterior, and also leucine would certainly be in the internal of the globular protein.

 

Likes disfix likes


21

Changing a single amino acid in a protein consisting of 433 amino acids would

A) constantly alter the main framework of the protein but never change its tertiary framework or feature.

B) constantly change the primary structure of the protein and also occasionally change its tertiary structure or feature.

C) always change the primary and also tertiary framework of the protein however never change its attribute.

D) periodically transform the primary and tertiary structure of the protein however always transform its attribute.


B) constantly transform the main framework of the protein and sometimes alter its tertiary framework or function.


22

 Regular hemoglobin is a tetramer, consisting of 2 molecules of β-globin and 2 molecules of α-globin. In sickle-cell disease, as an outcome of a single amino acid readjust, the mutant hemoglobin tetramers associate with each other and assemble into huge fibers. Based on this information alone, we deserve to conclude that sickle-cell hemoglobin exhibits

A) transformed major structure.

B) transformed additional structure.

C) transformed tertiary framework.

D) changed quaternary framework.

E) changed major framework and also altered quaternary structure; the secondary and tertiary structures may or might not be transformed.


E) transformed major framework and also altered quaternary structure; the secondary and also tertiary structures may or may not be changed.


23

In a normal cellular protein, wbelow would certainly you mean to find a hydrophilic amino acid such as asparagine?

A) in the interior of the folded protein, ameans from water

B) on the exterior surface of the protein, communicating through water

C) in the transmembrane portion interacting with lipid fatty acid chains

D) on the exterior surconfront of the protein, communicating with water, or in a transmembrane percent connecting through lipid fatty acid chains


on the exterior surchallenge of the protein, communicating through water


24

If cells are grvery own in a medium containing radioactive 35S, which of these molecules will be radioactively labeled?

A) phospholipids

B) nucleic acids

C) proteins

D) starch


Proteins 


25

If cells are grvery own in a tool containing radioenergetic 32P, which of these molecules will certainly be radioproactively labeled?

A) triacylglycerols

B) nucleic acids

C) fatty acids

D) starch


nucleic acids


26

How will certainly brief heating (to 95°C) impact macromolecular frameworks in aqueous solution?

A) Unsaturated fatty acid tails will come to be saturated.

B) Proteins will unfold (denature).

C) Starch will hydrolyze right into monomeric sugars.

D) Proteins will certainly hydrolyze into amino acids.

 


 Proteins will unfold (denature


27

Which of the adhering to statements around the 5" finish of a polynucleotide strand also of RNA is correct?

A) The 5" finish has actually a hydroxyl group attached to the number 5 carbon of ribose.

B) The 5" end has a phosphate group attached to the number 5 carbon of ribose.

C) The 5" end has phosphate attached to the number 5 carbon of the nitrogenous base.

D) The 5" finish has a nitrogenous base attached to the number 5 carbon of ribose.


 The 5" finish has actually a phosphate team attached to the number 5 carbon of ribose.


28

One of the main attributes of RNA molecules is to

A) transmit hereditary information to offspring.

B) feature in the synthesis of proteins.

C) make a copy of itself, therefore ensuring genetic continuity.

D) act as a pattern or blueprint to create DNA.


Function in the sythesis of proteins


29

 If 14C-labeled uracil is included to the development tool of cells, what macromolecules will certainly be labeled?

A) polysaccharides

B) proteins

C) DNA

D) RNA

E) both DNA and also RNA


Both DNA and also RNA


30

A nucleotide is written of

A) a nitrogenous base and a phosphate group.

B) a nitrogenous base and a pentose sugar.

C) a nitrogenous base, a phosphate group, and also a pentose sugar.

D) a nitrogenous base, a phosphate group, a pentose sugar, and also an amino acid.

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a nitrogenous base, a phosphate group, and a pentose sugar.


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