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Eduardwww [97]
3 years ago
14

What facts about DNA does the Watson-Crick model explain?

Biology
1 answer:
Luba_88 [7]3 years ago
3 0

Answer:

I think it explains that the DNA molecules are double helix with alenine and thymine paired together

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A scientist isolated the Hepatitis B surface protein gene and introduced it into the DNA of a banana plant. The scientist tested
omeli [17]

Answer:

A. The gene for surface protein was transcribed and translated.

Explanation:

Because all living organisms use the same genetic code, it is possible to express genes from one organism in the other. In this case, the DNA sequence that corresponds to the hepatitis B surface protein gene has been inserted into the banana, and the protein is expressed.

For the protein to be expressed, the gene must have been successfully transcribed into an mRNA by the banana plant machinery. This mRNA has then been translated into a protein that means the hepatitis B surface protein is now present in the cell.

4 0
3 years ago
If a gas has an absolute pressure of 319 kPa, its gage pressure is
makkiz [27]
I do beleive that the answer is c
5 0
3 years ago
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Some organisms, like lizards who bask in the sun, use ____________ to help regulate their ____________ environment.
dolphi86 [110]

Answer:

location, internal

7 0
2 years ago
Salivary amylase is released in the mouth where it breaks down sugars. however, it is inactive once it reaches the stomach where
GREYUIT [131]
<span>Amylase needs an optimum pH for its activity. It is in the range of 6-7. Below or above pH will denature this enzyme. The pH level is optimum for this enzyme in the mouth and hence it catalyses the break down of sugar. The pH level of stomach is lower than its optimum level duet to the activity of gastric acid. Hence the enzyme becomes inactive in the stomach.</span>
5 0
3 years ago
List the five classes of antibody heavy chains and provide one function for each.
Lesechka [4]

Answer:

IgM, IgA, IgE, IgD and IgG

Explanation:

IgM functions in the initial response to offence.

IgA is important for protection of mucus membranes such as in saliva, sweat, tears and gastric fluid.

IgE is active during allergic reactions and defense against infections.

IgD is found on the surface of lymphocytes and is activated upon contact with antigens.

IgG forms part of the secondary response to antigen and is also responsible for newborn protection.

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3 years ago
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