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motikmotik
3 years ago
15

According to the graph, which of these statements is true?

Biology
1 answer:
lorasvet [3.4K]3 years ago
3 0

Answer:

The correct answer is D

Explanation:

That's why in the graph the best reaction of the enzyme is on 40° C.

On low temperatures the enzyme activity is too low.

On very high temperatures it fall, so the enzyme works better in the middle temperatures.

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Assume that a point mutation changes the codon AUU to AUC. Why is this a silent mutation?
omeli [17]
Since the two codons are for the same amino acid, the mutation doesnt change the phenotypes.
6 0
3 years ago
A(n) _________ scan uses radioactive markers in the blood to monitor blood flow and metabolic activity via x-ray.
olya-2409 [2.1K]

Answer;

-PET scan

A PET scan uses radioactive markers in the blood to monitor blood flow and metabolic activity via x-ray

Explanation;

-A positron emission tomography (PET) scan is an imaging test that helps reveal how the tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.

-A PET scan is used to diagnose certain health conditions, to plan treatment, to find out how an existing condition is developing, and to see how effective a treatment is.

-In a PET scan, a machine detects radiation that is emitted by a radiotracer. A radiotracer consists of radioactive material that is tagged to a natural chemical, such as glucose.

7 0
3 years ago
Read 2 more answers
I need help, I don't understand this, so please try to explain?
Vinvika [58]

Answer:

Yeah, so basically the image is showing restriction enzymes. The job of restriction enzymes is mainly involved in research when scientists use them for cloning human genes. But that's besides the point...

Main thing you have to understand is that restriction enzymes cut at very specific places along DNA sequences. If you look at the restriction enzyme Rsa 1, you can notice that it cuts only between a thymine nucleotide base and an adenine nucleotide base. Next, if ya look at Sty 1 (be careful b/c W can represent adenine or thymine), it cuts only between two directly adjacent cytosine nucleotide bases!

SO.... if we go to Rsa 1, we can find the answers by dividing up the sequences between the pattern we saw in the gray box. It only cuts between adenine and thymine bases. Based on that, we can find the number of fragments created, and the segment lengths (basically just like how many nucleotide bases are in each strand). Hope ya found this helpful!

3 0
3 years ago
Please help me I don’t understand it.
Irina18 [472]

Answer:

1) bay - 0%

  cream - 0%

  buckskin - 100%

2) cream - 25%

    bay - 25%

   buckskin - 50%

3) co-dominance

Explanation:

Ok so a run down on Punnett Squares,  all you have to do is put the parent's genes on the top and right hand side and combine those two genes in the middle as I did in the picture.  Now, co-dominance, this basically means that there is no dominant allele.  For example, imagine a white flower (W) and a red flower (R).  If these two plants were to breed, you would get a pink flower (WR).  This means the red allele and the white allele are both co-dominant.  It is basically a combination of both genes that result in a mixed phenotype of the two genes, aka red and white makes pink.  This is also how you get an AB blood type.

I hope this helps!

6 0
3 years ago
Please help !! I don’t know the answer !!
just olya [345]

Answer:

I am pretty sure it is A or D sorry if this does not help

8 0
3 years ago
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