Question 1

Which statement best describes the principle of complementarity in cell theory?

Accepted Answer

The biochemical activities of cells are dictated by their structure, which determines their function.

Question 2

A scientist observes a cell with a large number of mitochondria. Which function is this cell most likely specialized for?

Accepted Answer

ATP production through aerobic respiration

Question 3

Which of the following best explains why the plasma membrane is relatively impermeable to most water-soluble molecules?

Accepted Answer

The hydrophobic tails of phospholipids form the interior of the membrane, creating a barrier to water-soluble substances.

Question 4

Which type of cell junction would be most important in preventing leakage between cells lining the stomach?

Accepted Answer

Tight junctions

Question 5

During protein synthesis, which RNA type carries the genetic instructions from the nucleus to the ribosome?

Accepted Answer

Messenger RNA (mRNA)

Question 6

A cell is placed in a hypotonic solution. What is the most likely outcome for the cell?

Accepted Answer

The cell will gain water and swell.

Question 7

Which process requires ATP to move substances against their concentration gradient?

Accepted Answer

Active transport

Question 8

What is the main function of lysosomes in a cell?

Accepted Answer

Digestion of worn-out organelles and cell debris

Question 9

Which organelle is responsible for detoxifying harmful substances such as alcohol and formaldehyde?

Accepted Answer

Peroxisomes

Question 10

If a DNA template strand has the sequence TACTGC, what is the sequence of the complementary mRNA produced during transcription?

Accepted Answer

UACUGC

Question 11

Which of the following best describes the function of gap junctions?

Accepted Answer

They allow communication and direct transfer of molecules between adjacent cells.

Question 12

Which process is most critical for kidney function and involves movement of water and solutes by hydrostatic pressure?

Accepted Answer

Filtration

Question 13

What is the correct order of events in mitosis?

Accepted Answer

Prophase, Metaphase, Anaphase, Telophase

Question 14

Which cellular extension is found in the respiratory tract and helps move mucus across the cell surface?

Accepted Answer

Cilia

Question 15

A cell is actively engulfing bacteria. Which process is being used?

Accepted Answer

Phagocytosis

Question 16

Which of the following is true about the sodium-potassium pump?

Accepted Answer

It pumps sodium out of the cell and potassium into the cell, both against their concentration gradients.

Question 17

Which cytoskeletal element is the largest and is involved in generating movement and providing cell shape?

Accepted Answer

Microfilaments

Question 18

Which process is highly selective and involves receptor proteins binding specific target molecules for cellular uptake?

Accepted Answer

Receptor-mediated endocytosis

Question 19

Which organelle modifies and packages proteins received from the rough ER?

Accepted Answer

Golgi apparatus

Question 20

During translation, what is the primary role of tRNA?

Accepted Answer

Escorts appropriate amino acids to the ribosome for protein synthesis

Cells: Structure, Function, and the Cellular Basis of Life

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