Topic 5– A: Photosynthesis and Respiration- 1. Photosynthesis, respiration and energy Flashcards
1
Q
Why is energy important?
A
Plant and animal cells need energy for biological processes to occur
2
Q
Why do plants need energy?
A
- Photosynthesis
- Active transport
- DNA replication
- Cell division
- Protein synthesis
3
Q
Why do animals need energy?
A
- Muscle contraction
- Maintenance of body temperature
- Active transport
- DNA replication
- Cell division
- Protein synthesis
4
Q
Respiration equation
A
Glucose + Oxygen= Carbon dioxide + Water + Energy
5
Q
Anaerobic respiration (animals)
A
glucose -> lactic acid + energy
6
Q
Anaerobic respiration (plants/ yeast)
A
Glucose-> ethanol + carbon dioxide + energy
7
Q
What is the difference between aerobic and anaerobic respiration?
A
- aerobic respiration requires oxygen but anaerobic respiration doesn’t require oxygen
8
Q
What is photosynthesis?
A
- It’s the process where energy from light is used to make glucose from water and carbon dioxide
- The light energy is converted to chemical energy in the form of glucose
9
Q
Formula for glucose
A
C6H12O6
10
Q
Photoautotroph
A
- Any organism that carries out photosynthesis
11
Q
How long is energy stored in the glucose?
A
Until the plants release it by respiration
12
Q
How do animals obtain glucose?
A
- By eating plants
- By eating animals which have eaten plants
13
Q
How is energy released?
A
By respiring glucose
14
Q
What is photosynthesis an example of ?
A
- metabolic pathway which occurs in a series of small reactions controlled by enzymes
15
Q
What is respiration ?
A
Releasing energy from glucose
