AP Biology Unit 2

AP Biology Unit 2

12th Grade

15 Qs

quiz-placeholder

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AP Biology Unit 2

AP Biology Unit 2

Assessment

Quiz

Science

12th Grade

Practice Problem

Hard

NGSS
MS-LS1-5

Standards-aligned

Created by

Lisa Thompson

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The LDL receptor is an integral membrane protein that crosses the plasma membrane, with portions of the protein extending both outside and into the interior of the cell. The amino acid side chains (R groups) in the region of the protein that crosses the membrane are most likely

charged

hydrophilic

hydrophobic

carbohydrates

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The hydrophilic regions of a membrane protein are most likely

present only in muscle cells

associated with the fatty acid region of the lipids

either on the surface or inserted into the interior of the membrane

exposed on the surface of the membrane

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Plasma membranes are relatively impermeable to water-soluble molecules because

the membranes are waxy

water molecules are nonpolar

their bilayer is comprised of phospholipids

they have salt crystals embedded within them

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is not one of the functional roles of membrane proteins?

Allowing movement of molecules that otherwise would be excluded by the lipid components of the membrane

Transferring signals from outside the cell to inside the cell

Facilitating the transport of macromolecules across the membrane

Stabilizing the lipid bilayer

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Define plasma membrane

lipid that helps minimize effects of temperature

only on the outer surface of the plasma membrane and are attached to proteins or lipids; form distinctive cellular markers

flexible boundary of a cell that separates a cell from its surroundings

may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which type of biological macromolecule is the main component of the plasma membrane?

carbohydrate

lipid

protein

nucleic acid

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?

the phosphate "head"

the lipid "tails"

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