Q: Which of the following equations correctly represents the general process of polymerization for proteins?

$$\text{Amino acid}_1 + \text{Amino acid}_2 \xrightarrow{\text{dehydration}} \text{Dipeptide} + H_2O$$

Question 1

Which of the following best describes the difference between a condensation (dehydration) reaction and a hydrolysis reaction in biological systems?

Accepted Answer

Condensation reactions join monomers by removing water, while hydrolysis reactions break polymers into monomers by adding water.

Question 2

A mutation in the gene encoding the beta-globin subunit of hemoglobin causes sickle cell anemia. This mutation results in the substitution of valine for glutamic acid at position 6. Which level of protein structure is directly altered by this mutation, and how does it ultimately affect the protein's function?

Accepted Answer

The primary structure is directly altered, which leads to changes in the protein's folding and function.

Question 3

Which of the following is NOT a function of proteins in living organisms?

Accepted Answer

Storing genetic information

Question 4

Which of the following equations correctly represents the general process of polymerization for proteins?

Accepted Answer

$$	ext{Amino acid}_1 + 	ext{Amino acid}_2 \xrightarrow{	ext{dehydration}} 	ext{Dipeptide} + H_2O$$

Question 5

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

Accepted Answer

DNA is usually double-stranded, while RNA is usually single-stranded.

Question 6

Which of the following best explains why the shape of a protein is critical to its function?

Accepted Answer

The shape determines the protein's ability to interact with specific molecules, such as substrates or receptors.

Question 7

Which of the following is a structural polysaccharide, and in which type of organism is it primarily found?

Accepted Answer

Cellulose; plants

Question 8

During the process of transcription, which of the following events occurs?

Accepted Answer

A DNA strand is used as a template to synthesize a complementary RNA strand.

Question 9

Which of the following best describes how carbohydrates are classified?

Accepted Answer

By the number of sugar units: monosaccharides, disaccharides, and polysaccharides

Question 10

Which of the following is a correct pairing of a carbohydrate and its function?

Accepted Answer

Glycogen; long-term energy storage in animals

Question 11

Which of the following best explains the importance of having 20 different amino acids in proteins?

Accepted Answer

Different amino acids allow for a wide variety of protein structures and functions due to their unique side chains.

Question 12

Which of the following is a correct sequence of events in the central dogma of molecular biology?

Accepted Answer

DNA $$ \rightarrow $$ RNA $$ \rightarrow $$ Protein

Question 13

Which of the following best describes how our cells obtain energy from carbohydrates?

Accepted Answer

By breaking down glucose through cellular respiration to produce ATP

Question 14

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

Accepted Answer

DNA replication produces two identical DNA molecules, while RNA replication produces RNA from a DNA template.

Question 15

Which of the following is a function of carbohydrates in cell-to-cell recognition?

Accepted Answer

Carbohydrates on the cell surface act as markers that help cells identify each other.

Question 16

Which of the following best explains why it is important to know the composition of cell walls in different organisms?

Accepted Answer

It helps in developing antibiotics and understanding how to target pathogens.

Question 17

Which of the following is a correct example of a disaccharide and its component monosaccharides?

Accepted Answer

Sucrose; glucose and fructose

Question 18

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

Accepted Answer

It is formed by hydrogen bonds between backbone atoms, resulting in alpha helices and beta sheets.

Question 19

Which of the following is a correct statement about the breakdown of macromolecules in the body?

Accepted Answer

Proteins, nucleic acids, and carbohydrates are broken down by hydrolysis reactions.

Question 20

Which of the following best explains why the structure of nucleic acids is important to their function?

Accepted Answer

The sequence of nucleotides encodes genetic information, and the double helix structure allows for accurate replication.

Biology 1306 Exam 2 Review – Step-by-Step Study Guidance

Study Guide - Practice Questions

Study Guide - Flashcards