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Umnica [9.8K]
3 years ago
10

9th grade biology question. 10pts

Biology
1 answer:
insens350 [35]3 years ago
7 0

Answer:

b

Explanation:

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Which of the following are part of the chemiosmotic coupling model? Protons are pumped out of the mitochondrial matrix into the
Lina20 [59]

The correct answer is: Protons are pumped out of the mitochondrial matrix into the intermembrane space

Chemiosmosis can be described as movement of ions across a selectively permeable membrane, down their electrochemical gradient. It occurs during the cellular respiration within mitochondria and it is involved in ATP synthesis (oxidative phosphorylation via ATP synthase).

Electrons from electron carriers (NADH and FADH) donate electrons to the electron transport chain and that causes changes in protein complexes of electron transport chain. As a consequence, protein complexes pump H+ across a selectively permeable cell membrane from the mitochondrial matrix into the intermembrane space of mitochondria.  

H+ can only get back and pass through the inner mitochondrial membrane with the help of ATP synthase (down their electrochemical gradient). ATP synthase turned by the force of the H+ diffusing through it forms ATP by adding a phosphate to ADP.

4 0
3 years ago
The Earth's seasons affect only the way plants grow and change.
Black_prince [1.1K]

Answer:

yes but it can also affect humans like tornadoes destroying homes?

6 0
2 years ago
Someone please help me
Aleks [24]
I would pick H but it might be J but I am pretty sure it is H so go with that ok if you need any thing else I will help you ok
7 0
3 years ago
Explain how mutations cause cancer cells.
earnstyle [38]

Answer:

Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.

Explanation:

4 0
3 years ago
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he Punnett square shows the cross for a particular trait between a homozygous dominant parent and a heterozygous parent. What is
Crazy boy [7]

Answer:

50%

Explanation:

Let's make a Punnett square to represent this, with X representing our dominant allele and x our recessive.

One homozygous dominant parent = XX

One heterozygous parent = Xx

      X    X

X   XX  XX  

x    Xx  Xx

So two out of our four outcomes are heterozygous for the trait. That means the answer is <u>B. 50%.</u>

5 0
3 years ago
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