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Elanso [62]
3 years ago
9

The most commonly occurring mutation in people with cystic fibrosis is a deletion of a single codon. this results in _____.

Biology
1 answer:
posledela3 years ago
7 0
This deletion results in a polypeptide missing an amino acid. Cystic fibrosis is a genetic disease that affects mostly the lungs, but also other organs such as the pancreas and the liver. It is caused by a mutation in the gene cystic fibrosis transmembrane conductance regulator (CFTR). This mutation is a deletion of three nucleotides that cause the loss of the amino acid phenylalanine.
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How is the light energy absorbed by plants important to photosynthesis?
4vir4ik [10]
I think that p<span>igments </span>absorb light<span> used in </span>photosynthesis. In photosynthesis<span>, the sun's </span>energy<span> is converted to chemical </span>energy<span> by photosynthetic organisms. ... For instance, </span>plants <span>appear green to us because they contain many chlorophyll a and b molecules, which reflect green </span>light<span>.

I think this is the answer. </span>
6 0
3 years ago
Ok so if I don't answer this question right imma get a beating soooo help a brotha out
german

Answer:Short

Explanation:Also I feel so bad for you.

6 0
3 years ago
The bicep muscle has an attachment point at the shoulder and one in the upper forearm. Look at these images of the bones of the
Lerok [7]
The answer is A.
If the bicipe muscle contracts it will bring the forearm up because the insertion of this muscle is  in the forearm.
One of the functions of this muscle is flexing the elbow, which would result in the action i already mentioned.
It couldn't be B, because that would be the work of another muscle, the triceps.



8 0
4 years ago
Read 2 more answers
McHutchison JG, Runyon BA. Spontaneous bacterial peritonitis. In: Gastrointestinal and Hepatic Infections, Surawicz CM, Owen RL
lyudmila [28]

SBP is a serious complication in patients with cirrhosis with high mortality rates (20–40%).

Patients at risk of developing SBP can be categorized in three groups firstly patients with active variceal bleeding patients with ascitic fluid protein <10 g/dl secondly those with a prior episode of SBP.

The most common bacteria causing SBP are gram-negative Escherichia coli and Klebsiella pneumoniae and gram-positive Streptococcus pneumoniae usually only a single organism is involved. Spontaneous bacterial peritonitis (SBP), an infection of ascitic fluid without a definitive intra-abdominal source that can be surgically treated is a common complication in patients with cirrhosis and ascites. Spontaneous bacterial peritonitis (SBP),is treated with a 10 to 14 day course of antibiotics .

To learn more about Spontaneous bacterial peritonitis (SBP) , here

brainly.com/question/13258891

#SPJ4

3 0
2 years ago
A) How does HIV bind to a host cell?
Taya2010 [7]

1. The correct answer is: The viral envelope proteins interact with CD4 and a co-receptor on the cell membrane.

Binding and entering the host cell are the first steps of the HIV virus infection. So, these steps play a major role in determining the ability of HIV to degrade the human immune system. Binding of HIV to CD4+ T lymphocytes (express chemokine receptors CCR5 and CXCR4 called co-receptors) triggers the fusion of the viral and host cell membranes, initiating infection (viral core gets into the cytoplasm).

Attachment of the virion can be:

• Nonspecific-envelop protein of the virus (Env) binds to cell-surface heparan sulfate proteoglycans

• Specific-Env binds to integrin.

2. The correct answer is: Activation of the host cell by cytokines, growth factors, or antigens.

After the viral capsid enters the cell, single-stranded RNA genome is released from the attached viral proteins and copied it into a complementary DNA (cDNA) molecule thanks to an enzyme called reverse transcriptase. Next step is the integration of the viral DNA into the host cell's genome. This process is done by another viral enzyme called integrase. The integrated DNA  is transcribed into RNA and then translated into proteins that will help the package of new viruse particles.

3. The answer is: false

Reverse transcriptase is an enzyme that catalyzes the formation of DNA from an RNA template. Since the genome of the virus (HIV) is single stranded RNA, reverse transcriptase copies it into a complementary DNA (cDNA) molecule. Thanks to this enzyme, formed cDNA can be integrated into host’s genome. Because of this proprety, antiretroviral drugs used to treat HIV infection work as reverse-transcriptase inhibitors.

7 0
3 years ago
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