1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GarryVolchara [31]
3 years ago
15

Why do organisms without oxygen need to convert pyruvate to lactate?

Biology
1 answer:
IrinaK [193]3 years ago
3 0

The question is incomplete. The complete question is:

Question: Why do organisms without oxygen need to convert pyruvate to lactate?

A) because pyruvate is toxic to the cells

B) in order to regenerate NAD+

C) in order to use lactate in the citric acid cycle

D) because lactate is needed to produce ATP

Answer:

B) in order to regenerate NAD+

Explanation:

Kreb's cycle and electron transport chain (ETC) are the aerobic stages of cellular respiration. ETC regenerates NAD+ and FAD+ by oxidation of NADH and FADH2 produced during glycolysis and Kreb's cycle. Here, oxygen serves as the terminal electron acceptor.

Glycolytic reactions use NAD+ as an electron acceptor and produce NADH. Therefore, a constant supply of NAD+ is required to sustain glycolysis. In absence of oxygen, ETC cannot occur and organisms convert pyruvate into lactate. Pyruvate is reduced in lactate and NADH serves as the electron donor. Thereby, lactate fermentation regenerates NAD+ to continue the process of glycolysis.

You might be interested in
Genetics is the most important factor that affects your physical fitness.<br> a. True<br> b. False
faltersainse [42]
<span>This is false. Everyone is unique in this aspect and although genetics can help you, or make life harder, it also falls down to personal behavior and habits. There are no genetics that can save you from constant overeating and there are no genetics that can prevent you from working out, at least to your possible extent.</span>
6 0
3 years ago
Read 2 more answers
Most of the known single-gene disorders are _____.
Firdavs [7]
Mendelian disorder is the known disorder of a single gene
8 0
3 years ago
Is it true that a deficiency of a trace mineral is just as damaging to your health as a deficiency of a major mineral?
Hatshy [7]
Yes as both play a vital role in your body
4 0
3 years ago
The genes for a brain are found all the way down the vertebrate family tree in a small worm-like animal called amphicoelus. True
Deffense [45]

Answer:

Its false  

Amphicoelias altus (from the gr. "Hollow character on both high sides") is the only known species of the extinct genus. Titoniense, in what is now North America. Amphicoelias is present in stratigraphic zone 6 of the Morrison Formation

It was also similar in size to Diplodocus, about 25 meters long. Although most scientists have used this data to distinguish Amphicoelias and Diplodocus as separate genera, at least one has suggested that Amphicoelias is probably the largest synonym for Diplodocus.3 Amphicoelias altus, was named by paleontologist Edward Drinker Cope in December of 1877, although it was not published until 1878, for an incomplete skeleton consisting of two vertebrae, a pubis, the hip, and a femur, bone of the upper leg.4 Cope also named a second species, A. fragillimus

5 0
3 years ago
The thick, flat sheet of tendon deep to the scalp is called the
Oxana [17]

Answer:

epicranial aponeurosis.

Explanation:

epicranial aponeurosis.

6 0
3 years ago
Other questions:
  • The complete separation of a bone from its normal position in a joint is known as a
    7·1 answer
  • Explain why offspring are not clones of each other or their parents.
    15·1 answer
  • Which of the following is not a source of groundwater pollution? A.landfills b.septic tanks c.smoke stacks d.fertilizer
    7·1 answer
  • Douglas and McGarty (2001) reported that the anonymity of Internet chat rooms, newsgroups and listservs seems to foster more hos
    12·1 answer
  • Why is complementary base pairing so important to the success of protein synthesis?
    15·1 answer
  • Describe 2 adaptations that allow humans to be bipedal
    15·1 answer
  • I will Mark you Brainliest for the quickest and correct answer Please help O really need you help
    5·2 answers
  • Plss help me with this carbon cycle!!!!
    9·1 answer
  • Herniit, green cribs
    9·1 answer
  • What are important of some natural things ​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!