Biology Test Biology Cellular and Molecular 2

Question 1

Which enzyme is responsible for unwinding the DNA double helix during replication?

Accepted Answer

Helicase

Answer

DNA polymerase

Answer

Ligase

Answer

Primase

Question 2

What is the primary function of the smooth endoplasmic reticulum (SER)?

Accepted Answer

Lipid synthesis and detoxification

Answer

Protein synthesis

Answer

DNA replication

Answer

Packaging proteins for secretion

Question 3

During which phase of mitosis do chromosomes align at the cell's equatorial plate?

Accepted Answer

Metaphase

Answer

Prophase

Answer

Anaphase

Answer

Telophase

Question 4

Which type of RNA carries amino acids to the ribosome during translation?

Accepted Answer

tRNA

Answer

mRNA

Answer

rRNA

Answer

snRNA

Question 5

What structural feature distinguishes prokaryotic cells from eukaryotic cells?

Accepted Answer

Absence of a membrane-bound nucleus

Answer

Presence of ribosomes

Answer

Ability to perform photosynthesis

Answer

Presence of a cell membrane

Question 6

What is the term for the programmed cell death pathway that removes damaged or unnecessary cells?

Accepted Answer

Apoptosis

Answer

Necrosis

Answer

Autolysis

Answer

Lysis

Question 7

Which bond connects amino acids together to form a polypeptide chain?

Accepted Answer

Peptide bond

Answer

Hydrogen bond

Answer

Ionic bond

Answer

Disulfide bond