Question

Complete the following paragraph, using the words below to complete the sentences.

During the process of _____(1)_____, cells convert _____(2)_____ to NAD+ by passing high-energy _____(3)_____ back to _____(4)_____ acid. Because this process does not require oxygen, it is said to be _____(5)_____. There are two main types of process: _____ (6)_____ and _____(7)_____ acid. In this process, _____(8)_____ and a few other microorganisms form an _____(9)_____ called _____(10)_____ alcohol.

1
alcohol

2
pyruvic

3
alcoholic

4
yeasts

5
fermentation

6
anaerobic

7
lactic

8
ethyl

9
NADH

10
electrons

Answer 1

1. fermentation

2. NADH

3. electrons

4. pyruvic

5. anaerobic

6. alcoholic

7.  lactic

8. yeasts

9.  alcohol

10. ethyl

Answer 2

Answer:

1. fermentation  

2. NADH  

3. electrons  

4. pyruvic  

5. anaerobic

6. alcoholic

7.  lactic

8. yeasts

9.  alcohol

10. ethyl

Explanation:

In fermentation, energy is obtained from organic compounds without the need of oxygen, that's why it's called an anaerobic process. This process usually starts pyruvic acid, which is a product of glycolysis, which with help of a specific enzyme takes electrons from NADH and is transformed into another molecule, depending on the type of fermentation. In alcoholic fermentation, it's transformed into ethanol (also called ethyl alcohol), whereas in lactic fermentation it's transformed into lactic acid. Yeasts are unicellular organisms that perform alcoholic fermentation.