Which of the following is the function of a totipotent cell?

Fights infectious diseases.

Aids in the maturation of sex cells.

Carries electrical impulses.

Develops into any kind of cell.

Answer and Explanation

The Correct Answer is D

It can self-renew by dividing and develop into the three primary germ cell layers of the early embryo and into extra-embryonic tissues such as the placenta.

A fertilized egg is a totipotent stem cell and as such can develop into any specialized cell found in the organism.

Choice A is not correct because totipotent cells do not fight infectious diseases.

Choice B is not correct because totipotent cells do not aid in the maturation of sex cells.

Choice C is not correct because totipotent cells do not carry electrical impulses.

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Correct Answer is D

Explanation

Genes are segments of DNA that encode the information for making proteins.

The sequence of nucleotides (As, Ts, Cs, and Gs) in a gene determines the amino acid sequence of the protein. DNA sequencing is the process of determining the sequence of nucleotides in a piece of DNA.

Choice A is incorrect because enzymes are proteins that catalyze chemical reactions, not DNA sequences. Choice B is incorrect because blood types are determined by the presence or absence of certain antigens on the surface of red blood cells, not by DNA sequences. Choice C is incorrect because hormones are chemical messengers that regulate various body functions, not DNA sequences.

A. Particles become less ordered. B. Particles have a decrease in mobility. C. Particles move closer together. D. Intermolecular forces between particles become stronger.

Correct Answer is A

Explanation

As a solid turns to a liquid, the particles become less ordered and more free to move around.

Choice B is not correct because particles have an increase in mobility as a solid turns to a liquid.

Choice C is not correct because particles move further apart as a solid turns to a liquid.

Choice D is not correct because intermolecular forces between particles become weaker as a solid turns to a liquid.

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Solution in bag	Solution outside bag	Bag mass change (g):
water	Water	-0.2
20% sucrose	Water	+2.4
, 40% sucrose	Water	+4.3
, 60% sucrose	water	+5.8

Which of the following is the function of a totipotent cell?

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Naxlex Comprehensive Predictor Exams

Which of the following is used to determine a person's DNA sequence?

Correct Answer is D

Explanation

Which of the following summarizes a change that takes place as a solid turns to a liquid?

Correct Answer is A

Explanation

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