Question 1

Which organelle is primarily responsible for producing ATP through aerobic cellular respiration in eukaryotic cells?

Accepted Answer

Mitochondria

Question 2

A cell is observed to have an abundance of smooth endoplasmic reticulum (SER). Which function is this cell most likely specialized for?

Accepted Answer

Lipid metabolism and detoxification

Question 3

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 4

What is the correct sequence of events during mitosis?

Accepted Answer

Prophase, Metaphase, Anaphase, Telophase

Question 5

A mutation causes the loss of function in the cell’s lysosomes. Which cellular process would be most directly affected?

Accepted Answer

Intracellular digestion and breakdown of waste

Question 6

Which structure is responsible for organizing the mitotic spindle during cell division?

Accepted Answer

Centrosome

Question 7

What is the role of the signal-recognition particle (SRP) during protein synthesis?

Accepted Answer

It directs the ribosome-mRNA complex to dock on the rough ER.

Question 8

Which of the following best describes the function of transfer RNA (tRNA) during translation?

Accepted Answer

tRNA brings specific amino acids to the ribosome based on codon-anticodon pairing.

Question 9

If a cell’s rough ER is damaged, which process would be most directly impaired?

Accepted Answer

Synthesis and modification of proteins for secretion

Question 10

Which of the following statements about the genetic code is correct?

Accepted Answer

There are 64 possible codons and 20 amino acids, so some amino acids are coded by multiple codons.

Question 11

A patient’s muscle cells are unable to store and release calcium efficiently. Which organelle is most likely malfunctioning?

Accepted Answer

Smooth endoplasmic reticulum (sarcoplasmic reticulum)

Question 12

During translation, what is the first codon recognized by the ribosome, and which amino acid does it code for?

Accepted Answer

AUG, which codes for methionine

Question 13

Which phase of mitosis is characterized by the alignment of chromosomes along the cell’s equator?

Accepted Answer

Metaphase

Question 14

What is the function of the Golgi apparatus in protein processing?

Accepted Answer

It modifies, sorts, and packages proteins received from the rough ER.

Question 15

Which of the following best describes the process of transcription?

Accepted Answer

Copying DNA code into mRNA using complementary base pairing

Question 16

A cell is observed to have many cilia on its surface. What is the most likely function of this cell?

Accepted Answer

Moving substances across the cell surface

Question 17

Which of the following equations correctly represents the number of possible codons given 4 bases and 3 positions?

Accepted Answer

$$4^3$$

Question 18

During which phase of mitosis do the centromeres of chromosomes split and chromatids are pulled toward opposite poles?

Accepted Answer

Anaphase

Question 19

Which organelle contains its own DNA, RNA, and ribosomes, and divides by fission similar to bacteria?

Accepted Answer

Mitochondria

Question 20

A scientist isolates a cell and finds that its ribosomes are mostly free-floating in the cytosol. What type of proteins is this cell likely producing?

Accepted Answer

Soluble proteins that function in the cytosol or other organelles

Cell Structure and Function: Key Organelles and Processes in Human Cells

Study Guide - Practice Questions

Study Guide - Flashcards