Unit 1 homework

Question 1

concentration gradient

Answer 1

The concentration difference between two substances , the larger the gradient, the faster the diffusion is

Question 2

Why does distilled water have a different pH than pure water

Answer 2

It has had many ions removed

Question 3

Primary versus secondary active transport

Answer 3

Uses ATP energy but secondary may not need it right away

Question 4

Function of sterols

Answer 4

Influence membrane fluidity

Question 5

Cholesterol

Answer 5

Sterol in animal cells

Polar ends (because of the OH group), they hydrocarbon rings are not polar

Question 6

Membrane symmetry

Answer 6

Proteins on one side are different from the other side because the sides have different functions

Question 7

Functions of biological molecules in fluid mosaic model

Answer 7

Phospholipids- make up the bilayer

Proteins- transport, some are enzymes, trigger signals, attachment and recognition

Question 8

Transport proteins other name

Answer 8

Intergral proteins

Question 9

What does active transport use

Answer 9

pumps

Question 10

Types of passive diffusion

Answer 10

simple and facilitated