Question

In: Biology

QUESTION 1 Neutral mutations do not affect an organism’s fitness. (ex: Silent mutations) True False QUESTION...

QUESTION 1

Neutral mutations do not affect an organism’s fitness. (ex: Silent mutations)

True

False

QUESTION 2

Lactic acid fermentation occurs in

		muscle cells.
		yeast.
		DNA.
		protein.

QUESTION 4

Where does pyruvate processing take place?  

		mitochondrial membrane
		cytosol
		mitochondrial inner membrane
		mitochondrial matrix
		mitochondrial intermembrane space

QUESTION 7

Photosystem I produces  

ATP.
water.
glucose.
NADH.
NADPH.

Expert Solution

Ans:-1) True.

The mutation in which natural selection doesn't affect the spread of mutation in a species is called neutral mutation.

They don't have any beneficial or detrimental affect to ability of organism to survive or reproduce.

Ans:-2) muscle cells.

Lactic acid fermentation is anaerobic reaction. It usually occurs in muscle cells when there is no enough supply of oxygen. So this process provide a way to get ATP with out oxygen. It relies on stored starch or sugars and break them to simpler molecules.

Glucose + 2ADP + 2Pi - - - - - - - - > 2 lactate + 2ATP

Ans:-3) Mitochondrial matrix.

Pyruvate is produced by glycolysis in cytoplasm. The pyruvate then enter in mitochondrial matrix. There pyruvate is process to release one molecule of CO2 and two molecule of acetyl CoA. This acetyl CoA then enter in krebs cycle.

Ans:-4) NADPH

PSI is located on outer surface of thylakoid membrane. P700 is its photocentre. The pigment in ps1 absorbs light of longer wavelength i. e 700nm. It is involved in both cyclic and non cyclic photophosphorylation. The main function of PSI is NADPH synthesis where it receives electron from PS2 using NADP+ reductase enzyme.

gladiator answered 2 years ago

why do you think some mutations are Silent in the genetic code

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