Question 1

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

Accepted Answer

Amylose contains $$\alpha(1 \rightarrow 4)$$ glycosidic bonds only, while amylopectin contains both $$\alpha(1 \rightarrow 4)$$ and $$\alpha(1 \rightarrow 6)$$ glycosidic bonds.

Question 2

Which of the following best describes a chiral carbon atom?

Accepted Answer

A carbon atom bonded to four different groups.

Question 3

Which of the following disaccharides is a nonreducing sugar?

Accepted Answer

Sucrose

Question 4

A fatty acid with the formula $$\mathrm{C$$_{17}$$H_{33}$$COOH}$ is best classified as:

Accepted Answer

A monounsaturated fatty acid

Question 5

Which of the following statements about the secondary structure of proteins is correct?

Accepted Answer

It involves hydrogen bonding between backbone atoms.

Question 6

Which of the following is a correct complementary DNA sequence for the strand $$5'	ext{-}ATGCGTACG-3'$$?

Accepted Answer

$$3'	ext{-}TACGCATGC-5'$$

Question 7

Which of the following best explains why cellulose cannot be digested by humans?

Accepted Answer

Cellulose contains $$\beta(1 \rightarrow 4)$$ glycosidic bonds, and humans lack the enzyme to hydrolyze these bonds.

Question 8

Which of the following is NOT a component of a nucleotide?

Accepted Answer

A carboxyl group

Question 9

Which of the following statements about triacylglycerols is correct?

Accepted Answer

They are composed of three fatty acids and one glycerol molecule.

Question 10

A mutation that results in the substitution of one amino acid for another in a protein is called:

Accepted Answer

A missense mutation

Question 11

Which of the following best describes the difference between D- and L-glucose?

Accepted Answer

D-glucose is the enantiomer found in nature, while L-glucose is its non-superimposable mirror image.

Question 12

Which of the following is a property of essential fatty acids?

Accepted Answer

They are polyunsaturated and must be obtained from the diet.

Question 13

Which of the following best describes the chemical reaction known as saponification?

Accepted Answer

The hydrolysis of triacylglycerols with a strong base to produce glycerol and soap.

Question 14

Which of the following statements about the tertiary structure of proteins is correct?

Accepted Answer

It involves interactions between R groups, including hydrophobic, hydrophilic, ionic, and disulfide bonds.

Question 15

Which of the following is a difference between DNA and RNA?

Accepted Answer

DNA contains thymine, while RNA contains uracil.

Question 16

Which of the following best describes the peptide bond?

Accepted Answer

A bond formed between the carboxyl group of one amino acid and the amino group of another.

Question 17

Which of the following is true about the anomeric carbon in a Haworth projection of glucose?

Accepted Answer

It is the carbon that was the carbonyl carbon in the open-chain form.

Question 18

Which of the following best describes the process of transcription?

Accepted Answer

The synthesis of RNA from a DNA template.

Question 19

Which of the following is a correct statement about cholesterol?

Accepted Answer

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

Question 20

Which of the following best describes a reducing sugar?

Accepted Answer

A sugar with a free anomeric carbon that can act as a reducing agent.

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

Guida di studio - Domande di pratica

Study guide - Flashcard