BIOL101 Module 4 Exam – Essential Biology I w/Lab | Latest 2026–2027 Verified Questions & Answers

BIOL101 Module 4 Exam – Essential
Biology I w/Lab | Latest 2026–2027
Verified Questions & Answers



SECTION A: DNA & RNA STRUCTURE (Questions 1–10)

Question 1
A nitrogenous base plus a deoxyribose is called a ________, and a
base plus deoxyribose plus a phosphate group is called a
_________.

A) Nucleotide; Nucleoside
B) Nucleoside; Nucleotide
C) Chromatin; Chromosome
D) Codon; Anticodon

Answer: B) Nucleoside; Nucleotide

,Question 2
Which of the following nitrogenous bases are classified as
purines?

A) Cytosine and Thymine
B) Adenine and Guanine
C) Uracil and Cytosine
D) Thymine and Uracil

Answer: B) Adenine and Guanine




Question 3
Which nitrogenous bases are classified as pyrimidines?

A) Adenine and Guanine
B) Cytosine, Thymine, and Uracil
C) Adenine and Thymine
D) Guanine and Cytosine

Answer: B) Cytosine, Thymine, and Uracil

,Question 4
In DNA, adenine always pairs with:

A) Guanine
B) Cytosine
C) Thymine
D) Uracil

Answer: C) Thymine




Question 5
In RNA, adenine always pairs with:

A) Thymine
B) Guanine
C) Cytosine
D) Uracil

Answer: D) Uracil

, Question 6
The sugar found in DNA is:

A) Ribose
B) Deoxyribose
C) Glucose
D) Sucrose

Answer: B) Deoxyribose




Question 7
The sugar found in RNA is:

A) Deoxyribose
B) Ribose
C) Fructose
D) Maltose

Answer: B) Ribose