Question 1

Which process describes the synthesis of RNA using the information in DNA?

Accepted Answer

Transcription

Question 2

What is the main structural difference between RNA and DNA?

Accepted Answer

RNA is single-stranded while DNA is double-stranded

Question 3

During translation, what is the role of mRNA?

Accepted Answer

It serves as a template for protein synthesis

Question 4

If a DNA sequence is $5'\,	ext{ATGCGT}\,3'$, what would be the corresponding RNA transcript?

Accepted Answer

$5'\,	ext{AUGCGU}\,3'$

Question 5

Which enzyme is responsible for synthesizing RNA from a DNA template?

Accepted Answer

RNA polymerase

Question 6

A mutation in the promoter region of a gene would most likely affect which process?

Accepted Answer

Transcription initiation

Question 7

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

Accepted Answer

DNA $\rightarrow$ RNA $\rightarrow$ Protein

Question 8

A cell is unable to synthesize a particular protein because it lacks a specific enzyme. Which hypothesis does this support?

Accepted Answer

One gene-one enzyme hypothesis

Question 9

Which of the following codons signals the start of translation?

Accepted Answer

$	ext{AUG}$

Question 10

If a mutation changes a codon from $	ext{GAA}$ to $	ext{GAG}$, but both code for glutamic acid, what type of mutation is this?

Accepted Answer

Silent mutation

Question 11

Which molecule acts as an adapter, bringing amino acids to the ribosome during translation?

Accepted Answer

tRNA

Question 12

A scientist wants to express a human gene in bacteria. What must be included in the DNA sequence for successful transcription in bacteria?

Accepted Answer

A bacterial promoter

Question 13

Which of the following best explains why a protein may not function properly if a mutation occurs in its gene?

Accepted Answer

The mutation may change the amino acid sequence, altering protein structure

Question 14

Which process ensures that genetic information is accurately passed from one cell generation to the next?

Accepted Answer

DNA replication

Question 15

A researcher observes that bacteria grow on a plate made of a specific food, but not on a plate lacking that food. What does this suggest about the bacteria?

Accepted Answer

They require the food for growth and cannot synthesize it

Question 16

Which of the following is NOT a function of proteins in the cell?

Accepted Answer

Storing genetic information

Question 17

If a gene codes for a protein with 150 amino acids, what is the minimum number of nucleotides required in the coding region of the mRNA?

Accepted Answer

$450$

Question 18

Which of the following best describes a promoter in DNA?

Accepted Answer

A region where transcription begins

Question 19

A mutation in the gene encoding tRNA synthetase would most likely affect which cellular process?

Accepted Answer

Translation

Question 20

Which statement best explains why the genetic code is considered 'universal'?

Accepted Answer

The same codons specify the same amino acids in nearly all organisms

DNA Replication, Transcription, and Translation: Key Processes in Molecular Biology

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