Question 1

A plant cell is placed in a solution with a lower solute concentration than inside the cell. Based on the image provided (Image 1), what term best describes the state of the cell, and what would you expect to happen?

Accepted Answer

Turgid; the cell will expand

Question 2

Which of the following best describes the plasma membrane’s ability to be 'semipermeable'?

Accepted Answer

It is selective and only allows certain molecules to pass through

Question 3

Refer to Image 2. In the fluid-mosaic model, what do the red shapes represent, and what property do they contribute to the membrane?

Accepted Answer

Red shapes are proteins; they contribute to the mosaic property of the membrane

Question 4

Which of the following statements best describes the difference between passive and active transport?

Accepted Answer

Passive transport moves solutes from high to low concentration without needing ATP; active transport moves solutes from low to high concentration and requires ATP

Question 5

Which of the following changes would decrease how tightly phospholipid tails pack together in the membrane, thereby increasing fluidity of the membrane?

Accepted Answer

Increasing unsaturated fatty acid tails

Question 6

Which of the following describes the movement and time for movement that occurs for proteins and phospholipids in the plasma membrane?

Accepted Answer

Lateral movement: occurs numerous times per second; Flip-flopping: occurs once per month

Question 7

Which of the following osmotic relationships do most human cells want to be in?

Accepted Answer

Isotonic

Question 8

Which of the following are types of active transport? Select all that apply.

Accepted Answer

Proton pumps, Electrogenic pumps, Na-K pumps

Question 9

The maintenance of constant hydrostatic pressure within a cell is known as:

Accepted Answer

Osmoregulation

Question 10

When describing the concentration of solutes in a cell compared to the outside environment, which of the following describe accurate relationships? Select all that apply.

Accepted Answer

Higher solute inside the cell: Hypertonic to the cell; Lower solute inside the cell: Hypotonic to the cell; Equal solute inside the cell: Isotonic to the cell

Question 11

Compared to distilled water, you would expect a human blood cell to be _______ to distilled water.

Accepted Answer

Hypertonic

Question 12

Which of the following describes accurate information/comparisons between peripheral and integral proteins?

Accepted Answer

Peripheral proteins only have hydrophilic domains; Both are located on the plasma membrane; Integral proteins are amphipathic

Question 13

Which of the following describes the differences between phagocytosis and pinocytosis?

Accepted Answer

Phagocytosis engulfs solid particles using extensions of the cell membrane; pinocytosis takes in extracellular fluids and dissolved solutes

Question 14

What powers secondary active transport?

Accepted Answer

Energy released by ions traveling down their electrochemical gradient

Question 15

Refer to the images provided. Which image best represents an antiporter?

Accepted Answer

Image 5

Question 16

What is the difference between a proton pump and a cotransporter?

Accepted Answer

Proton pumps push only hydrogen ions; cotransporters involve 2 specific molecules, with one moving with and the other against the concentration gradient

Question 17

What are the inputs and outputs of the Na-K pump?

Accepted Answer

$$3\mathrm{Na}^+$$ 	ext{ out},\ 2\mathrm{K}^+ 	ext{ in}$

Question 18

Which of the following describes an electrogenic pump?

Accepted Answer

Use ATP to pump ions against their concentration gradient; create and maintain gradient as well as voltage across the membrane

Question 19

Aquaporins are:

Accepted Answer

Water channels

BIOL211 Chapter 7 – Membrane Transport and Osmosis Study Guidance

Study Guide - Practice Questions

Study Guide - Flashcards