Chapter 5 Flashcards
(12 cards)
1
Q
Structure of a cell membrane
A
Protiens between 2 bilayers of phospholipids
2
Q
Isotonic
A
Water mass does not change
3
Q
Hypotonic
A
Water mass increases
4
Q
Hypertonic
A
Water mass decreases
5
Q
Functions of proteins located in plasma membrane
A
- Facilitate transport of molecules across the cell membrane
- Act as receptors for cell signaling
- Maintain cell structure
6
Q
What type of proteins are needed for facilitated diffusion?
A
Channel and carrier proteins
7
Q
Facilitated diffusion
A
Does not need energy and goes with concentration gradient
8
Q
What does an enzyme do with a substrate before a reaction occurs?
A
Binds to a substrate molecule at its active site
9
Q
What is an enzyme ?
A
A protein hat speeds up chemical reactions
10
Q
What is needed in order for an enzyme to carry out it function?
A
- A substrate to bind to
- And cofactors
11
Q
Exergonic reaction
A
Releases energy
12
Q
Endergonic
A
Absorbs energy
