Q: During aerobic metabolism, mitochondria use oxygen to produce ATP. Which equation best represents this process?

$$\text{Glucose} + \text{O}_2 + \text{ADP} \rightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{ATP}$$

Q: A cell is actively transporting sodium ions out and potassium ions in, against their concentration gradients. Which process and equation best describe this?

Primary active transport; $$\text{ATP} + 3\text{Na}^+_{\text{in}} + 2\text{K}^+_{\text{out}} \rightarrow 3\text{Na}^+_{\text{out}} + 2\text{K}^+_{\text{in}} + \text{ADP}$$

Question 1

Which of the following best describes the function of the plasma membrane in a typical somatic cell?

Accepted Answer

It acts as a selectively permeable barrier, regulating exchange with the environment.

Question 2

A red blood cell is placed in a solution and begins to swell until it ruptures. Which type of solution is this, and what is the underlying process?

Accepted Answer

Hypotonic solution; water moves into the cell by osmosis.

Question 3

Which organelle is primarily responsible for the synthesis of steroid hormones in reproductive cells?

Accepted Answer

Smooth endoplasmic reticulum (SER)

Question 4

During aerobic metabolism, mitochondria use oxygen to produce ATP. Which equation best represents this process?

Accepted Answer

$$	ext{Glucose} + 	ext{O}_2 + 	ext{ADP} ightarrow 	ext{CO}_2 + 	ext{H}_2	ext{O} + 	ext{ATP}$$

Question 5

Which of the following membrane proteins is responsible for labeling cells as normal or abnormal, playing a key role in immune response?

Accepted Answer

Recognition proteins

Question 6

A patient is given an intravenous solution that is hypertonic compared to their red blood cells. What is the most likely outcome for the red blood cells?

Accepted Answer

They will lose water and shrink (crenation).

Question 7

Which cytoskeletal element is most directly involved in muscle contraction by interacting with myosin?

Accepted Answer

Microfilaments

Question 8

A cell is actively transporting sodium ions out and potassium ions in, against their concentration gradients. Which process and equation best describe this?

Accepted Answer

Primary active transport; $$	ext{ATP} + 3	ext{Na}^+_{	ext{in}} + 2	ext{K}^+_{	ext{out}} ightarrow 3	ext{Na}^+_{	ext{out}} + 2	ext{K}^+_{	ext{in}} + 	ext{ADP}$$

Question 9

Which process allows a cell to engulf large particles, such as bacteria, using pseudopodia?

Accepted Answer

Phagocytosis

Question 10

If a cell's repressor genes become faulty, what is the most likely consequence?

Accepted Answer

The cell may divide uncontrollably, potentially leading to cancer.

Question 11

Which organelle is responsible for modifying and packaging secretions, renewing the plasma membrane, and packaging enzymes for use in the cytoplasm?

Accepted Answer

Golgi apparatus

Question 12

A cell is placed in a solution with a lower solute concentration than its cytoplasm. What term describes this solution, and what is the expected effect on the cell?

Accepted Answer

Hypotonic; cell swells and may rupture

Question 13

Which of the following best explains why water diffuses more rapidly across the plasma membrane than solutes?

Accepted Answer

Aquaporins are more abundant than solute channels.

Question 14

Which process describes the synthesis of RNA from a DNA template, and what enzyme is primarily involved?

Accepted Answer

Transcription; RNA polymerase

Question 15

Which of the following is NOT a function of the glycocalyx on the cell membrane?

Accepted Answer

ATP production

Question 16

A cell uses ATP to move glucose into the cytoplasm by coupling it to the movement of sodium ions down their concentration gradient. Which type of transport is this?

Accepted Answer

Secondary active transport

Question 17

Which phase of the cell cycle involves the duplication of DNA?

Accepted Answer

S phase

Question 18

Which of the following best describes the role of lysosomes in cellular homeostasis?

Accepted Answer

They break down and recycle damaged organelles and molecules.

Question 19

Which cellular structure is responsible for forming the spindle apparatus during mitosis?

Accepted Answer

Centrioles

Question 20

Which of the following statements about cell differentiation is correct?

Accepted Answer

Cells differentiate by turning off genes not needed by that cell type.

Cellular Level of Organization: Fundamentals of Anatomy & Physiology (Chapter 3)

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