Question

In the Krebs cycle, how is citric acid formed? (1 point)

O Enzymes combine hydrogen ions, oxygen, and electrons.
O Carbon dioxide bonds with a chain of coenzyme A.
O Pyruvic acid molecules are broken down by an acetyl group.
O Acetyl-CoA joins with a large molecule called oxaloacetic acid.

Answer 1

For connexus students: Cell Work Unit Test

Step-by-step explanation:

1. 12

2. Chlorophyll breaks down because there's less sunlight.

3. The Calvin-Cycle is light independent (does not need sunlight)

4. light

5. C6 H12 O6 + 6O2 + 6H2O + energy

6. Pyruvic Acid+ NADH --> Lactic Acid+ NAD+

7. Acetyl-CoA joins with a large molecule called oxaloacetic acid

8.Electrolosis

9. ATP

10. Krebs Cycle

11. Oxygen

12. 12

13. Ectotherms cannot insulate- and can only control their body temperature by choice.

14. Shivering

Answer 2

D. Acetyl-CoA joins with a large molecule called oxaloacetic acid.

Step-by-step explanation:

this forms a citrate molecule, which is then oxidized and releases two carbon dioxide molecules to be fed into the cycle.