SCIENCE 2ND QUARTER: ENERGY MOLECULES AND METABOLIC PATHWAYS Flashcards
1
Q
Why do we require energy?
A
- all activities cells do need it
- we need it to live
2
Q
What is our primary energy source?
A
- The Sun
3
Q
What are Autotrophs?
A
- organisms that can create their own food
- plants, bacteria
4
Q
What are Heterotrophs?
A
- organisms that require eating to survive
- animals, humans
5
Q
What is Metabolism?
A
- chemical reactions in a cell
6
Q
What are Metabolic Pathways?
A
- a series of chemical reactions
- product of one reaction = substrate for next
7
Q
What are the two types of metabolic pathways?
A
- Catabolic
- Anabolic
8
Q
What are Catabolic Pathways?
A
- release energy by breaking down large molecules into smaller ones.
- large to small
9
Q
What are Anabolic Pathways?
A
- use energy from catabolic pathways to build large molecules out of small ones
- large into small
10
Q
How do we get the continuous flow of life?
A
- interaction between both metabolic pathways
11
Q
What is Cellular Respiration?
A
- catabolic
- organic molecules break = release energy for cells
12
Q
What is Photosynthesis?
A
- anabolic
- light energy from the sun turned into chemical energy available for cell use
13
Q
What is the basic unit of cellular energy?
A
- Adenosine Triphosphate
14
Q
What is ATP’s structure?
A
- a multipurpose storehouse of energy
- an energy-carrier molecule in all organisms
- Nucleotide
15
Q
What are Nucleotides?
A
- adenine base
- a ribose sugar
- three phosphate groups
