Question 1

Which of the following best describes the central dogma of molecular biology?

Accepted Answer

DNA is replicated, transcribed into RNA, and then translated into protein.

Question 2

Which component is NOT part of a nucleotide found in DNA?

Accepted Answer

Carboxyl group

Question 3

What is the difference between a nucleoside and a nucleotide?

Accepted Answer

A nucleotide contains a phosphate group, while a nucleoside does not.

Question 4

Which nitrogenous base is found in RNA but not in DNA?

Accepted Answer

Uracil

Question 5

Which type of bond connects nucleotides in the backbone of DNA and RNA?

Accepted Answer

Phosphodiester bond

Question 6

In the double helix structure of DNA, which base pairs with guanine?

Accepted Answer

Cytosine

Question 7

Which of the following statements about exons is TRUE?

Accepted Answer

Exons code for parts of the final mature RNA product.

Question 8

Which of the following is a function of messenger RNA (mRNA)?

Accepted Answer

Carries genetic information from DNA to ribosomes for protein synthesis.

Question 9

Which of the following best explains why engineered insulin can be administered at mealtime?

Accepted Answer

Aspartic acid is introduced to discourage hexamer formation, allowing faster absorption.

Question 10

Which of the following is TRUE regarding the storage of genetic information in cells?

Accepted Answer

Genetic information is stored as chromosomes in the nucleus.

Question 11

Which of the following is a pyrimidine base found in DNA?

Accepted Answer

Thymine

Question 12

If a DNA strand has the sequence 5'-ATTGCC-3', what is the complementary sequence?

Accepted Answer

3'-TAACGG-5'

Question 13

Which process involves the synthesis of RNA from a DNA template?

Accepted Answer

Transcription

Question 14

Which of the following is NOT an application of genetic engineering?

Accepted Answer

Increasing the number of chromosomes in an organism

Question 15

Which of the following statements about the human genome is correct?

Accepted Answer

Only about 1.5% of the human genome consists of exons.

Question 16

Which of the following best describes a gene?

Accepted Answer

A segment of DNA that specifies the sequence of a polypeptide or functional RNA.

Question 17

Which of the following is TRUE about the backbone of DNA?

Accepted Answer

It is composed of alternating phosphate and pentose sugar groups.

Question 18

Which of the following base pairs is stabilized by three hydrogen bonds?

Accepted Answer

Guanine-Cytosine

Question 19

Which of the following is a real-world application of manipulating nucleotide sequences in genes?

Accepted Answer

Changing the amino acid sequence of a protein to improve its function

Question 20

Which of the following statements about codons is correct?

Accepted Answer

Each codon codes for a single amino acid or a start/stop signal.

Nucleic Acids: Structure, Function, and Applications

Study Guide - Practice Questions