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Svetlanka [38]
3 years ago
8

If a doctor wanted to be sure that a patient's urinary system is working properly, what would be the BEST indicators to investig

ate? A. The balance of salts and amount of urine produced B. The amount of sugars in the blood C. The amount of nutrients absorbed into the bloodstream D. The body's ability to digest carbohydrates and proteins Please select the best answer from the choices provided. A B C D.
Biology
1 answer:
rusak2 [61]3 years ago
5 0

Answer:

Its a

Explanation:

I just took the test

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People with sickle cell anemia have one incorrect amino acid in their beta chain. The first seven amino acids in the beta chain
denis-greek [22]

Answer: Valine

Explanation:

hemoglobin A (normal) is HbA, while hemoglobin S (present in people with sickle cell anemia) is HbS

A sequence of 146 amino acids is present in the Hemoglobin.

The first 6 amino acids in HbA are: valine, histidine, leucine, threonine, proline, and glutamic acid.

The first six amino acids in HbS is:

valine, histidine, leucine, threonine, proline, and VALINE

In Hbs, the 6th amino acid (Glutamic acid) has already been mutated to Valine, a nonpolar, branched amino acid.

5 0
3 years ago
The gated channels that respond to physical distortion of the membrane surface are called ________. These channels are important
stellarik [79]

Answer:

mechanically gated channels; sensory receptors

Explanation:

8 0
3 years ago
If you were to try and pair a thymine with a cytosine (a non Watson-Crick base pairing), then would you expect to see any stabil
Artyom0805 [142]

Answer:

Yes, two hydrogen bonds could form between thymine and cytosine.

Explanation:

Cytosine is a pyrimidine base found in both DNA and RNA, and Thymine is a pyrimidine base found in only DNA. Electronegative Oxygen and Nitrogen atoms with free lone pairs are potential hydrogen bond acceptors. Hydrogen atoms attached to very electronegative atoms like Oxygen and Nitrogen have strong partial positive charge and are potential hydrogen bond donors.

One hydrogen bond could form between the C4 carbonyl group on thymine which is a hydrogen bond acceptor and the C4 amino group on cytosine which is a hydrogen bond donor. Also, another hydrogen bond could be formed between N3 of thymine which is a hydrogen bond donor and the N3 of cytosine that is a hydrogen bond acceptor.

It is important to note that hydrogen bond cannot be formed between them because the C2 carbonyl groups found on both bases are both hydrogen bond acceptors.

7 0
4 years ago
An organism is multi-cellular, cannot move about freely, lives on land, and decomposes other organisms for food. Into which king
likoan [24]
Fungus, it breaks down dead , decomposing material for food and cannot move around. Often found on land, in mushrooms and what not :o)
4 0
4 years ago
Read 2 more answers
Which of these is the best reason for doing more background research after making an observation and before forming a hypothesis
natulia [17]
B, if it has already been proven multiple time that something doesn't work why waste time doing the exact same thing and if you learn a bit more about the experiment it could change what you want to do.
8 0
3 years ago
Read 2 more answers
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