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Kay [80]
3 years ago
14

Which is the final event that occurs when a star is forming?

Biology
1 answer:
DiKsa [7]3 years ago
6 0

Answer:

D. Nuclear fusion begins under high pressure.

Explanation:

A star is a giant astronomical or celestial object that is comprised of a luminous sphere of plasma, binded together by its own gravitational force.

Some of the examples of stars are;

  • Canopus.
  • Sun (closest to the Earth)
  • Betelgeuse.
  • Antares.
  • Vega.

Stars are typically made up of two (2) main hot gas, Hydrogen (H) and Helium (He). The chronological order in which the formation of a star occur are;

1. Gravity pulls gas and dust together to form dense cores.

2. A protostar forms as mass increases.

3. Nuclear fusion begins under high pressure.

Hence, the final event that occurs when a star is forming is that nuclear fusion begins under high pressure.

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Imagine that I start off with 10 molecules of oxaloacetate in a mitochondria. I now allow the TCA to run just enough to generate
lara31 [8.8K]

Answer:

The correct option is option D which is  10 – 1 molecule of Oxaloacetate (OAA) is regenerated for every molecule of Acetyl-Coenzyme (AcCoA) used.

Explanation:

As the complete question is not given, the complete question is as below

Imagine that I start off with 10 molecules of oxaloacetate in a mitochondria. After running the TCA to generate 20 molecules of CO2, how many molecules of oxaloacetate will be left in the mitochondria (assuming oxaloacetate is being used only for TCA in these mitochondria)?

A) 30 – each molecule of CO2 generated corresponds to an increase of one OAA

B) 20 – every two molecules of CO2 generated corresponds to an increase of one OAA

C) 0 – two molecules of CO2 generated corresponds to one AcCoA used in the TCA; each AcCoA requires one molecule of OAA

D) 10 – one molecule of OAA is regenerated for every molecule of AcCoA used

Each cycle of TCA result in consumption of 1 Acetyl-Coenzyme (AcCoA) and 1 Oxaloacetate (OAA) molecule to give rise to 3 molecules of NADH and 2 molecules of CO2 per cycle. But at the end of each cycle, OAA molecule is regenerated. So the number of oxaloacetate(OAA) molecules remains unchanged.

Thus the correct option is option D which is  10 – 1 molecule of Oxaloacetate (OAA) is regenerated for every molecule of Acetyl-Coenzyme (AcCoA) used.

8 0
3 years ago
Diffusion by which mechanism occurs more rapidly in metal alloys?
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For about reaction C4H10 plus 02 yields C02 plus H20 match the proper coefficient to the chemical substance it goes way for a ba
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