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svetlana [45]
3 years ago
9

What is often referred to as the control center of the cell. It contains DNA and controls many of the cell's

Biology
1 answer:
Alisiya [41]3 years ago
3 0
The answer is A, the nucleus.
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A Karyotype Test Determines Chromosome Count.Whatever the age, the test used to diagnose Turner syndrome is the same—and it is known as a karyotype. A karyotype is a blood test that produces an image of your chromosomes.

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3 years ago
after a power stroke, the myosin head must detach from acting before another powerstroke can occur. what causes
kompoz [17]

The myosin head separates from actin as a result of ATP binding. The intrinsic ATPase activity of myosin then transforms ATP into ADP and Pi. The myosin head's angle is altered into a cocked state by the energy generated during ATP hydrolysis. The myosin head is now ready to move in the future.

The myosin protein is in a high-energy conformation when the head is cocked. At the end of the power stroke, the myosin head is in a low-energy position because this energy has been used up during the power stroke. ADP is released following the power stroke, but the cross-bridge is still there and actin and myosin are joined together.

Since ATP is readily available, the cross-bridge cycle can repeat, and muscular contraction can go on as long as ATP is there.

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6 0
1 year ago
Greater amounts of the pigment carotene are produced when the skin is exposed to the sun
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The most abundant protein is dead epidermal structures such as hair and melanin.
3 0
4 years ago
Compare a diploid cell and a haploid cell. Include where each cell is located.
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5 0
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Read 2 more answers
Describe how alveoli are adapted for gas exchange( 4 marks)​
SashulF [63]

Answer:

they give the lungs a really big surface area. they have moist, thin walls (just one cell thick) they have a lot of tiny blood vessels called capillaries.

The walls of the alveoli are only one cell thick. This makes the exchange surface very thin - shortening the diffusion distance across which gases have to move. Each alveolus is surrounded by blood capillaries which ensure a good blood supply.Adaptations of the alveoli:

Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through.

Explanation:

Have great day

3 0
3 years ago
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