Question 1

Which of the following best describes the process by which nucleic acids are formed from nucleotides?

Accepted Answer

Dehydration synthesis reaction

Question 2

Which of the following correctly lists the three components of a nucleotide?

Accepted Answer

Phosphate group, pentose sugar, nitrogenous base

Question 3

What type of bond connects nucleotides together in the backbone of a nucleic acid?

Accepted Answer

Phosphodiester bond

Question 4

Given the following DNA template strand: $$5'	ext{-}ATGCGTACG-3'$$, what is the sequence of the complementary DNA strand?

Accepted Answer

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

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 describes the function of tRNA during protein synthesis?

Accepted Answer

It brings amino acids to the ribosome and matches them to the mRNA codon.

Question 7

During DNA replication, what does 'semiconservative' mean?

Accepted Answer

Each new DNA molecule contains one old strand and one new strand.

Question 8

If a DNA coding strand has the sequence $$5'	ext{-}ATG\,GCC\,TAA-3'$$, what is the sequence of the mRNA produced during transcription?

Accepted Answer

$$5'	ext{-}AUG\,GCC\,UAA-3'$$

Question 9

Which of the following best defines a codon?

Accepted Answer

A sequence of three nucleotides in mRNA that codes for a specific amino acid

Question 10

Given the mRNA sequence $$5'	ext{-}AUG\,GCU\,UAC-3'$$, what is the sequence of tRNA anticodons that would pair with it during translation?

Accepted Answer

$$3'	ext{-}UAC\,CGA\,AUG-5'$$

Question 11

A mutation changes the DNA sequence $$5'	ext{-}ATG\,GCC\,TAA-3' to$$ $$5'	ext{-}ATG\,GCA\,TAA-3'. $$What type of mutation is this?

Accepted Answer

Missense mutation

Question 12

Which of the following best describes the primary structure of a nucleic acid?

Accepted Answer

The sequence of nucleotides in the nucleic acid chain

Question 13

Which of the following base pairs is correct for DNA?

Accepted Answer

Adenine pairs with Thymine

Question 14

Which type of bond holds complementary base pairs together in the DNA double helix?

Accepted Answer

Hydrogen bonds

Question 15

A patient is diagnosed with sickle cell anemia, which is caused by a single nucleotide change in the hemoglobin gene. This is an example of which type of mutation?

Accepted Answer

Point mutation

Question 16

Which of the following is a function of rRNA?

Accepted Answer

It forms the main structural and catalytic components of ribosomes.

Question 17

If the mRNA codon is $$5'	ext{-}UAA-3'$$, what amino acid does it code for?

Accepted Answer

It is a stop codon and does not code for any amino acid.

Question 18

Which of the following best describes the process of translation?

Accepted Answer

The synthesis of a protein from an mRNA template

Question 19

A DNA sequence is mutated by the insertion of a single nucleotide. What is the most likely consequence of this mutation?

Accepted Answer

A frameshift mutation, altering the reading frame of the gene

Question 20

Which of the following is TRUE regarding the directionality of DNA strands in the double helix?

Accepted Answer

The two strands run in opposite directions (antiparallel).

Nucleic Acids and Protein Synthesis: Study Guide

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