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kvasek [131]
3 years ago
7

Worth all the points I have- Can anyone help me on this. My teacher told me I did it completely wrong :( I really need help ASAP

Biology
1 answer:
vodka [1.7K]3 years ago
7 0

Answer:

if you f her she will let you get straight A+

Explanation:

ik becuase ive done it

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Describe how a single amino acid substitution causes hemoglobin molecules to stick together. Use what you know about the structu
Ivenika [448]

Question: Describe how a single amino acid substitution causes hemoglobin molecules to stick together. Use what you know about the structure of Hb and HbS, the properties of glutamic acid and valine, and how hydrophobicity causes molecules to behave in water.

Answer:

A Single amino acid must be polar to attract, just like water.

Explanation:

Sickle cell is an genetic illness and it is began by a alteration that arises in the beta sub units of the haemoglobin. Haemoglobin is a tetrameric protein made up of 2 alpha sub units and 2 beta sub units and it is the important part of the blood accountable for oxygen passage. Sickle cell is a illness that consequences from a replacement of a polar amino acid identified as glutamate with a non polar one valine at site six of the beta polypeptide component of haemoglobin. The replacement occurs as a consequence of a alteration in one of the bases in the beta-globin gene from adenine to thymine  . As a outcome of this change, the beta polypeptide chains convert sticky in low oxygen circumstances since the valine sticks out of the chain and interrelates with neighboring non-polar amino acids.  

6 0
3 years ago
DNA samples should be stored in an airtight containers to prevent contamination true or false
Aleksandr-060686 [28]

Answer: True

Explanation:

DNA is a biological evidence. It is a heredity material which is present in all organisms on earth. The DNA in humans can be taken as sample from nails, bones, blood, skin, hair and other sources.

The DNA samples can be taken so as to establish the identity of the culprit, victim or any one which is associated with crime.

The DNA evidence has applicability as a potent evidence in the court of law. Thus utmost care should be taken to preserve it's integrity until it is analysed and presented in the court of law.

Thus the DNA evidence should be collected and preserved in airtight containers so as to prevent the entry of airborne pathogens like bacteria, virus these can contaminate the sample evidence and can make the evidence not of any use.

 

7 0
3 years ago
Why the walls of the ventricles are much thicker than the walls of the atria.
Mkey [24]

Answer:

The ventricles of the heart have thicker muscular walls than the atria. This is because blood is pumped out of the heart at greater pressure from these chambers compared to the atria.

Explanation:

hope this helps

8 0
2 years ago
Which of the following best describes the term predation?
worty [1.4K]

one species using another as a food source, typically killing it

7 0
3 years ago
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What is the main function of these organs?
DerKrebs [107]

Answer:

C

Explanation:

The sider has seveal eyes to see his surroundings allowing him to hunt or hide.

4 0
2 years ago
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