Question 1

During the process of transcription, which enzyme is responsible for synthesizing the mRNA strand by adding complementary nucleotides to the DNA template?

Accepted Answer

RNA polymerase

Question 2

Which of the following best describes the role of the promoter region during transcription?

Accepted Answer

It is the DNA sequence where transcription factors and RNA polymerase bind to initiate transcription.

Question 3

What is the correct sequence of events during the elongation phase of transcription?

Accepted Answer

RNA polymerase covalently bonds complementary nucleotides to the growing mRNA molecule.

Question 4

Which statement about post-translational modification is TRUE?

Accepted Answer

It is necessary for newly formed polypeptides to become fully functional proteins.

Question 5

During translation, what is the function of the anticodon on tRNA?

Accepted Answer

It is complementary to the mRNA codon and ensures the correct amino acid is added to the polypeptide chain.

Question 6

Which phase of the cell cycle is characterized by DNA replication?

Accepted Answer

S phase

Question 7

A cell is observed to have condensed chromatin, a disintegrating nuclear envelope, and spindle fibers forming. Which stage of mitosis is this cell in?

Accepted Answer

Prophase

Question 8

What is the primary difference between benign and malignant tumors?

Accepted Answer

Benign tumors do not invade surrounding tissues and are less likely to cause death, while malignant tumors invade and destroy other tissues.

Question 9

Which checkpoint in the cell cycle is most critical for preventing uncontrolled cell division and the development of cancer?

Accepted Answer

G$$_1$$ checkpoint

Question 10

If a cell fails to pass a checkpoint due to DNA damage, what is the most likely outcome?

Accepted Answer

The cell will undergo programmed cell death (apoptosis).

Question 11

During DNA replication, which enzyme is responsible for adding nucleotides to the growing DNA strand?

Accepted Answer

DNA polymerase

Question 12

Which of the following best describes semiconservative replication?

Accepted Answer

Each new DNA molecule consists of one old strand and one new strand.

Question 13

Which event marks the beginning of metaphase during mitosis?

Accepted Answer

Sister chromatids align along the equator (metaphase plate) of the cell.

Question 14

A researcher observes a cell with a cleavage furrow forming at the equator. Which process is being observed?

Accepted Answer

Cytokinesis

Question 15

Which of the following is NOT a requirement for a cell to pass the G$$_1$$ checkpoint and proceed with division?

Accepted Answer

High cell density in the tissue

Question 16

Which process involves the removal of introns and splicing of exons in pre-mRNA?

Accepted Answer

Post-transcriptional modification

Question 17

A patient is diagnosed with a malignant tumor that has spread to other tissues. What is the term for this process?

Accepted Answer

Metastasis

Question 18

Which of the following best explains why post-translational modification is necessary for some proteins?

Accepted Answer

It ensures that polypeptides are properly folded and combined to become functional proteins.

Question 19

Which stage of mitosis is characterized by the reassembly of the nuclear envelope and the uncoiling of chromosomes into chromatin?

Accepted Answer

Telophase

Question 20

A cell in the liver remains in the G$$_0$$ phase after maturation. What does this indicate about the cell?

Accepted Answer

It is in a non-dividing, resting state.

Chapter three pt. 4

Study Guide - Practice Questions

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