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BIOL123 Form & Function Study Guide - UNIT 2

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BIOL123 Form & Function Study Guide - UNIT 2

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Questions and Answers

What is the primary difference between active and passive transport?

Energy requirements (correct)

Direction of movement of a substance relative to its concentration gradient

Speed of transport

Type of molecules being transported

What type of transport involves moving ions across the membrane against the concentration gradient?

Primary active transport (correct)

Secondary active transport

Facilitated diffusion

Simple diffusion

Which type of transport protein changes shape to allow movement of molecules across the membrane?

Facilitated protein

Channel protein

Pump protein

Carrier protein (correct)

What is the term for the movement of bulk materials into or out of a cell?

Bulk transport Signup and view all the answers

What is the term for a positively charged ion?

Cation Signup and view all the answers

What type of transport is involved in the uptake of mineral nutrients from the soil by plant roots?

Active transport Signup and view all the answers

What is the primary function of the hydrophilic portion of a phospholipid molecule?

To interact with aqueous environments outside the cell Signup and view all the answers

What is the orientation of phospholipid molecules during membrane assembly?

Hydrophobic tails facing inside the cell, hydrophilic heads facing outside the cell Signup and view all the answers

What type of molecule can easily pass through a plasma membrane unaided?

Non-polar molecules Signup and view all the answers

What is the function of the hydrophobic portion of a phospholipid molecule?

To provide structure and support to the cell membrane Signup and view all the answers

What is responsible for the selective permeability of a plasma membrane?

The composition of the phospholipid bilayer Signup and view all the answers

What type of molecules require help to get across the plasma membrane?

Polar molecules Signup and view all the answers