Question 1

Which of the following best describes the process by which DNA is converted into a functional protein in a eukaryotic cell?

Accepted Answer

Transcription in the nucleus followed by translation on ribosomes in the cytoplasm or rough ER

Question 2

During the synthesis of a nucleotide, which type of chemical reaction links the phosphate group to the sugar molecule?

Accepted Answer

Dehydration reaction

Question 3

A mutation in the gene encoding for collagen results in weak connective tissue, loose joints, and fragile skin. Which inherited disorder does this most likely describe?

Accepted Answer

Ehlers-Danlos syndrome

Question 4

Which of the following is required for proper collagen crosslinking during synthesis?

Accepted Answer

Vitamin C and copper

Question 5

Which of the following best explains why cartilage heals poorly after injury?

Accepted Answer

Cartilage is avascular and lacks direct blood supply

Question 6

Which of the following best describes the role of the rough endoplasmic reticulum (RER) in protein synthesis?

Accepted Answer

It synthesizes and packages integral membrane and secreted proteins

Question 7

A patient presents with bleeding gums, poor wound healing, and soft bones. Which deficiency is most likely responsible for these symptoms?

Accepted Answer

Vitamin C deficiency

Question 8

Which of the following best describes the function of the nuclear pore complex?

Accepted Answer

It regulates the transport of molecules between the nucleus and cytoplasm

Question 9

Which of the following is a correct base pairing in DNA?

Accepted Answer

Adenine pairs with thymine

Question 10

Which of the following best describes the process of exocytosis?

Accepted Answer

The release of intracellular molecules to the extracellular space via vesicles

Question 11

A scientist is studying a protein that is destined to be secreted from the cell. Which of the following best describes the correct pathway for this protein?

Accepted Answer

Ribosome on RER → Golgi apparatus → vesicle → plasma membrane

Question 12

Which of the following is a function of glycosaminoglycans (GAGs) in connective tissue?

Accepted Answer

They attract water and provide compressive resistance

Question 13

Which of the following equations correctly represents the hydrolysis of a disaccharide?

Accepted Answer

$C_{12}H_{22}O_{11} + H_2O \rightarrow 2C_6H_{12}O_6$

Question 14

Which of the following best explains why a mutation in the gene for lysyl oxidase can lead to connective tissue disorders?

Accepted Answer

Lysyl oxidase is necessary for the crosslinking of collagen fibers

Question 15

Which of the following statements about the extracellular matrix (ECM) is correct?

Accepted Answer

Collagen is the most abundant protein in the ECM

Question 16

A patient with a genetic mutation affecting the synthesis of glycosaminoglycans (GAGs) would most likely experience which of the following symptoms?

Accepted Answer

Reduced ability of connective tissue to resist compression

Question 17

Which of the following best describes the difference between free ribosomes and ribosomes bound to the rough ER?

Accepted Answer

Free ribosomes synthesize cytosolic proteins, while rough ER ribosomes synthesize membrane-bound and secreted proteins

Question 18

Which of the following best explains the role of SNARE proteins in vesicular transport?

Accepted Answer

They mediate the fusion of vesicles with target membranes

Question 19

Which of the following is a correct statement about the structure of DNA?

Accepted Answer

DNA consists of two antiparallel strands held together by hydrogen bonds between complementary bases

Question 20

A patient with a complete tear of the anterior cruciate ligament (ACL) is most likely to experience which of the following?

Accepted Answer

Severe instability of the knee joint

Lecture #3

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