Q: Which of the following is the correct formula for calculating the rate of diffusion ($$R) $$across a membrane, given surface area ($$A$$), concentration difference ($$ riangle C$$), and membrane thickness ($$d$$)?

$$R = \frac{A \times \triangle C}{d}$$

Question 1

Which of the following best describes the function of messenger RNA (mRNA) in the process of protein synthesis?

Accepted Answer

It carries the genetic code from DNA to the ribosome for translation.

Question 2

Which organelle is primarily responsible for the distribution of ions across cell membranes, maintaining cellular homeostasis?

Accepted Answer

Plasma membrane

Question 3

Which type of chemical bond is formed when electrons are shared equally between two atoms?

Accepted Answer

Nonpolar covalent bond

Question 4

During osmosis, which of the following best describes the movement of water?

Accepted Answer

Water moves from an area of low solute concentration to high solute concentration.

Question 5

Which phase of the cell cycle is DNA replicated?

Accepted Answer

S phase

Question 6

Which of the following is an example of a catabolic reaction?

Accepted Answer

Breakdown of glucose during glycolysis

Question 7

Enzymes decrease the energy required for a reaction to occur. This energy is known as:

Accepted Answer

Activation energy

Question 8

Which of the following best describes the anatomical location of the bladder?

Accepted Answer

Hypogastric region

Question 9

Which of the following is true regarding the axial skeleton?

Accepted Answer

It consists of the head, spine, and thoracic cage.

Question 10

Which of the following is a function of proteins in the cell membrane?

Accepted Answer

Facilitating movement of ions and molecules across the membrane

Question 11

Which of the following best describes the process of translation in protein synthesis?

Accepted Answer

Assembling amino acids into a polypeptide chain based on mRNA sequence

Question 12

Which of the following is the correct formula for calculating the rate of diffusion ($$R) $$across a membrane, given surface area ($$A$$), concentration difference ($$	riangle C$$), and membrane thickness ($$d$$)?

Accepted Answer

$$R = \frac{A 	imes 	riangle C}{d}$$

Question 13

Which of the following statements about G-protein coupled receptors (GPCRs) is correct?

Accepted Answer

GPCRs activate intracellular signaling cascades upon ligand binding.

Question 14

Which of the following is a reduced atom in a redox reaction?

Accepted Answer

An atom that gains electrons

Question 15

Which of the following best describes the function of the appendicular skeleton?

Accepted Answer

Facilitates movement and supports limbs

Question 16

Which of the following is NOT a function of the plasma membrane?

Accepted Answer

Synthesizing proteins

Question 17

Which of the following best describes the role of enzymes in biochemical reactions?

Accepted Answer

Enzymes decrease the activation energy, speeding up reactions.

Question 18

Which of the following is the correct sequence for the central dogma of molecular biology?

Accepted Answer

DNA → RNA → Protein

Question 19

Which of the following is a real-life example of passive transport in human physiology?

Accepted Answer

Oxygen diffusing from alveoli into blood capillaries

Question 20

Which of the following best describes how cell activation is measured in laboratory experiments?

Accepted Answer

By measuring changes in ion concentrations

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