Question 1

Which of the following statements correctly describes the difference between amylose and cellulose?

Accepted Answer

Amylose contains $$\alpha(1 \rightarrow 4)$$ glycosidic bonds, while cellulose contains $$\beta(1 \rightarrow 4)$$ glycosidic bonds.

Question 2

Which of the following best describes a chiral carbon atom?

Accepted Answer

A carbon atom bonded to four different atoms or groups.

Question 3

Which of the following is a nonreducing sugar?

Accepted Answer

Sucrose

Question 4

A patient is diagnosed with lactose intolerance. Which glycosidic bond is the enzyme lactase unable to hydrolyze?

Accepted Answer

$$\beta(1 \rightarrow 4)$$

Question 5

Which of the following statements about unsaturated fatty acids is TRUE?

Accepted Answer

They can have cis or trans geometric isomers, but only cis isomers are common in nature.

Question 6

Which of the following processes converts a triacylglycerol into soap and glycerol?

Accepted Answer

Saponification

Question 7

Which of the following best describes the primary structure of a protein?

Accepted Answer

The sequence of amino acids linked by peptide bonds.

Question 8

Which of the following attractive forces is responsible for the secondary structure of proteins?

Accepted Answer

Hydrogen bonding between backbone atoms.

Question 9

A mutation changes a DNA sequence from 5'-ATG-GCC-TAA-3' to 5'-ATG-GTC-TAA-3'. What type of mutation is this?

Accepted Answer

Missense mutation

Question 10

Which of the following statements about DNA and RNA is CORRECT?

Accepted Answer

RNA contains uracil instead of thymine.

Question 11

Which of the following best describes the difference between a nucleoside and a nucleotide?

Accepted Answer

A nucleoside contains a nitrogenous base and a sugar; a nucleotide contains a nitrogenous base, a sugar, and a phosphate group.

Question 12

Which of the following amino acids would be classified as polar acidic based on its R group?

Accepted Answer

Glutamic acid

Question 13

Which of the following is TRUE regarding the denaturation of proteins?

Accepted Answer

The secondary, tertiary, and quaternary structures are disrupted, but the primary structure remains intact.

Question 14

Which of the following is a correct complementary DNA sequence for the strand 5'-GATTACA-3'?

Accepted Answer

3'-CTAATGT-5'

Question 15

Which of the following statements about cholesterol is CORRECT?

Accepted Answer

Cholesterol is a steroid with four fused rings and a hydroxyl group.

Question 16

Which of the following best describes the difference between fats and oils?

Accepted Answer

Fats are solid at room temperature due to a higher proportion of saturated fatty acids, while oils are liquid due to more unsaturated fatty acids.

Question 17

Which of the following is a function of bile salts derived from cholesterol?

Accepted Answer

Emulsification of dietary fats in the small intestine.

Question 18

Which of the following best describes the 3' and 5' ends of a nucleic acid strand?

Accepted Answer

The 3' end has a free hydroxyl group, and the 5' end has a free phosphate group.

Question 19

Which of the following is TRUE about the D and L forms of monosaccharides?

Accepted Answer

Only the D form occurs naturally in most biological systems.

Question 20

Which of the following is a correct description of translation in protein synthesis?

Accepted Answer

The process by which mRNA is used as a template to synthesize a protein.

Comprehensive Study Notes: Carbohydrates, Lipids, Proteins, and Nucleic Acids

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