Q: Which equation best represents the net movement of water across a semipermeable membrane due to osmosis?

$$\Delta \pi = RTC(\text{inside}) - RTC(\text{outside})$$

Question 1

Which of the following best describes the fluid mosaic model of the plasma membrane?

Accepted Answer

A dynamic structure with proteins embedded in or attached to a bilayer of phospholipids.

Question 2

Which type of cell junction allows the passage of ions and small molecules directly between adjacent cells, facilitating electrical signaling in cardiac muscle?

Accepted Answer

Gap junctions

Question 3

A red blood cell is placed in a hypotonic solution. What will most likely happen to the cell?

Accepted Answer

It will swell and possibly burst due to water influx.

Question 4

Which of the following substances can diffuse directly through the plasma membrane without the need for a transport protein?

Accepted Answer

Oxygen

Question 5

The sodium-potassium pump is an example of which type of transport?

Accepted Answer

Primary active transport

Question 6

Which equation best represents the net movement of water across a semipermeable membrane due to osmosis?

Accepted Answer

$$\Delta \pi = RTC(	ext{inside}) - RTC(	ext{outside})$$

Question 7

Which process involves the engulfment of large particles, such as bacteria, by a cell?

Accepted Answer

Phagocytosis

Question 8

In G protein-coupled receptor signaling, what is the immediate effect of ligand binding to the receptor?

Accepted Answer

Conformational change in the receptor that activates the G protein

Question 9

Which enzyme is responsible for unwinding the DNA double helix during replication?

Accepted Answer

Helicase

Question 10

Which statement best describes the semiconservative model of DNA replication?

Accepted Answer

Each new DNA molecule consists of one parental and one new strand.

Question 11

During translation, which base pairing rule applies between mRNA codons and tRNA anticodons?

Accepted Answer

A pairs with U, G pairs with C

Question 12

Which type of RNA carries amino acids to the ribosome during protein synthesis?

Accepted Answer

tRNA

Question 13

Which connective tissue fiber type provides the greatest tensile strength to tissues such as tendons?

Accepted Answer

Collagen fibers

Question 14

Which germ layer gives rise to the nervous system and epidermis?

Accepted Answer

Ectoderm

Question 15

Which of the following is a function of lysosomes in the cell?

Accepted Answer

Intracellular digestion of macromolecules

Question 16

Which equation describes the rate of facilitated diffusion across a membrane?

Accepted Answer

$$J = \frac{J_{max} [S]}{K_m + [S]}$$

Question 17

Which epithelial tissue type is best suited for rapid diffusion and is found lining the alveoli of the lungs?

Accepted Answer

Simple squamous epithelium

Question 18

Which connective tissue type contains a large amount of extracellular matrix and is found in tendons and ligaments?

Accepted Answer

Dense regular connective tissue

Question 19

Which process is responsible for the removal of introns from pre-mRNA during mRNA processing?

Accepted Answer

Splicing

Question 20

A patient with a genetic mutation in the SRP (signal recognition particle) would most likely have defects in which cellular process?

Accepted Answer

Protein targeting to the endoplasmic reticulum

Cell Structure, Membrane Transport, Genetics, and Tissue Organization: Study Notes for Anatomy & Physiology

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