Question 1

Which of the following best describes the primary function of the mitochondria as shown in the first image?

Accepted Answer

Production of most of the cell’s ATP via aerobic respiration

Question 2

The cristae of mitochondria, as labeled in the diagram, are important because they:

Accepted Answer

Increase the surface area for enzymes involved in cellular respiration

Question 3

Based on the second image, which organelle is depicted and what is its primary function?

Accepted Answer

Ribosome; site of protein synthesis

Question 4

Which of the following statements about the Golgi apparatus, as shown in the third and fourth images, is correct?

Accepted Answer

It modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles

Question 5

A protein synthesized on the rough ER is destined for secretion. Which sequence of organelles will it pass through?

Accepted Answer

Rough ER → Golgi apparatus → secretory vesicle → plasma membrane

Question 6

Which cytoskeletal element, as shown in the fifth image, is primarily composed of actin and is involved in cell movement and shape changes?

Accepted Answer

Microfilaments

Question 7

The sixth image shows microtubules. Which of the following is a function of microtubules?

Accepted Answer

Forming the mitotic spindle during cell division

Question 8

The '9 + 2' arrangement of microtubules, as shown in the seventh image, is characteristic of which cellular structure?

Accepted Answer

Cilia and flagella

Question 9

Which process is illustrated in the eighth image, and what is its physiological significance?

Accepted Answer

Ciliary motion; moves mucus and trapped particles across epithelial surfaces

Question 10

The ninth image shows microvilli. What is the main function of microvilli in intestinal cells?

Accepted Answer

Increase surface area for absorption

Question 11

Which structure, as shown in the tenth image, contains the genetic library for nearly all cellular proteins?

Accepted Answer

Nucleus

Question 12

The process of DNA wrapping around histone proteins to form nucleosomes, as shown in the eleventh image, is important for:

Accepted Answer

Packaging DNA into chromatin

Question 13

During which phase of the cell cycle, as shown in the thirteenth image, does DNA replication occur?

Accepted Answer

S phase of interphase

Question 14

Which event occurs during metaphase, as depicted in the sixteenth image?

Accepted Answer

Chromosomes align at the cell’s equator

Question 15

What is the main role of the process shown in the nineteenth image (transcription and translation)?

Accepted Answer

Synthesize proteins based on genetic instructions

Question 16

Which of the following best describes the process of autophagy as shown in the last image?

Accepted Answer

The cell engulfs and degrades its own damaged organelles using lysosomes

Question 17

Which checkpoint in the cell cycle is considered the most important for determining whether a cell will divide, as shown in the thirteenth image?

Accepted Answer

G1 checkpoint (restriction point)

Question 18

Which enzyme is responsible for synthesizing mRNA from a DNA template during transcription?

Accepted Answer

RNA polymerase

Question 19

What is the function of telomerase in cell division and aging?

Accepted Answer

It lengthens telomeres, allowing cells to divide more times

Question 20

Which of the following is a correct description of the role of tRNA during translation?

Accepted Answer

It carries specific amino acids to the ribosome and matches them to the mRNA codon

Cytoplasm, Organelles, and Cellular Processes: Structure and Function

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