1

Which of the following is the primary function of red blood cells?

A

Carrying oxygen to body tissues

B

Producing antibodies

C

Transmitting nerve impulses

D

Regulating blood sugar levels

E

Answer

A, Explanation: Red blood cells, or erythrocytes, primarily function in carrying oxygen from the lungs to body tissues and removing carbon dioxide from the tissues to the lungs for exhalation.

Instruction

2

Which of the following is an example of an involuntary muscle?

A

Biceps

B

Quadriceps

C

Heart

D

Hamstrings

E

Answer

C, Explanation: The heart is an example of an involuntary muscle, as it contracts rhythmically to pump blood throughout the body without conscious effort, unlike voluntary muscles such as the biceps and quadriceps.

Instruction

3

Which part of the human brain is responsible for controlling balance and coordination?

A

Cerebrum

B

Cerebellum

C

Brainstem

D

Thalamus

E

Answer

B, Explanation: The cerebellum is the part of the brain responsible for controlling balance and coordination, while the cerebrum is involved in higher brain functions such as thinking and voluntary movements.

Instruction

4

Which of the following is a function of the liver?

A

Pumping blood throughout the body

B

Filtering and detoxifying blood

C

Producing insulin

D

Transporting oxygen to body tissues

E

Answer

B, Explanation: The liver plays a crucial role in filtering and detoxifying blood, metabolizing nutrients, and producing bile, but it is not responsible for pumping blood throughout the body or producing insulin.

Instruction

5

Which of the following biological phenomena is associated with "apoptosis"?

A

Cellular division

B

Cellular differentiation

C

Programmed cell death

D

Cellular respiration

E

Answer

C, Explanation: Apoptosis, also known as programmed cell death, is a highly regulated process in which cells undergo controlled self-destruction. This phenomenon plays a crucial role in various physiological processes, including embryonic development, tissue homeostasis, and immune response regulation. Options A (Cellular division), B (Cellular differentiation), and D (Cellular respiration) are not directly associated with apoptosis.

Instruction

6

In humans, what is the primary function of the lymphatic system?

A

Digesting food and absorbing nutrients

B

Regulating body temperature

C

Filtering and returning interstitial fluid to the bloodstream

D

Producing hormones to regulate metabolism

E

Answer

C, Explanation: The primary function of the lymphatic system in humans is to filter and return interstitial fluid, along with proteins and white blood cells, back to the bloodstream. This system also plays a crucial role in immune defense by transporting lymphocytes and antibodies throughout the body.

Instruction

7

Which of the following is an example of a symbiotic relationship where both organisms benefit?

A

Parasitism

B

Predation

C

Mutualism

D

Commensalism

E

Answer

C, Explanation: Mutualism is a symbiotic relationship where both organisms involved benefit from the interaction. This can include various examples such as pollination by bees, where the plant receives pollination services while the bee obtains nectar and pollen.

Instruction

8

Which of the following is a specialized cell responsible for producing antibodies in the immune system?

A

T lymphocyte

B

B lymphocyte

C

Macrophage

D

Natural killer cell

E

Answer

B, Explanation: B lymphocytes, also known as B cells, are specialized cells responsible for producing antibodies in the immune system. These antibodies play a crucial role in recognizing and neutralizing pathogens, such as bacteria and viruses.

Instruction

9

Which organelle is responsible for the synthesis of proteins in a eukaryotic cell?

A

Mitochondria

B

Golgi apparatus

C

Endoplasmic reticulum

D

Lysosomes

E

Answer

C, Explanation: The endoplasmic reticulum (ER) is responsible for the synthesis of proteins in a eukaryotic cell. It consists of rough ER, which has ribosomes attached to its surface, where protein synthesis occurs, and smooth ER, which is involved in lipid synthesis and detoxification.

Instruction

10

Which of the following cell organelles is responsible for the storage, modification, and packaging of proteins for secretion?

A

Nucleus

B

Mitochondria

C

Golgi apparatus

D

Ribosomes

E

Answer

C, Explanation: The Golgi apparatus is responsible for the storage, modification, and packaging of proteins for secretion in eukaryotic cells. It receives proteins from the endoplasmic reticulum (ER), modifies them, and packages them into vesicles for transportation to their final destinations.

Instruction