Which of the following structures is present in both prokaryotic and eukaryotic cells?

Cell membrane.

Golgi apparatus

Chloroplast

Endoplasmic reticulum.

Answer and Explanation

The Correct Answer is A

The cell membrane is a thin, flexible barrier that surrounds all cells and separates the inside of the cell from the outside environment.

It is composed of a lipid bilayer and regulates the movement of substances into and out of the cell.

Choice B is incorrect because the Golgi apparatus is not present in prokaryotic cells.

The Golgi apparatus is an organelle found in eukaryotic cells that is involved in modifying, sorting, and packaging proteins and lipids for transport to other parts of the cell or to be secreted outside the cell.

Choice C is incorrect because chloroplasts are not present in prokaryotic cells.

Chloroplasts are organelles found in plant cells and some algae that are responsible for photosynthesis.

Choice D is incorrect because the endoplasmic reticulum is not present in prokaryotic cells.

The endoplasmic reticulum is an organelle found in eukaryotic cells that is involved in protein synthesis and lipid metabolism.

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Correct Answer is B

Explanation

Electrophoresis is a technique that uses an electric field to separate charged molecules, such as DNA fragments, based on their size and charge.

Choice A is not correct because titration is a laboratory method used to determine the concentration of a solution.

Choice C is not correct because filtration is a laboratory method used to separate solids from liquids.

Choice D is not correct because spectrophotometry is a laboratory method used to measure the absorbance of light by a solution.

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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Which of the following structures is present in both prokaryotic and eukaryotic cells?

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Naxlex Comprehensive Predictor Exams

To separate genomic DNA fragments by size, which of these laboratory methods is most useful?

Correct Answer is B

Explanation

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Correct Answer is A

Explanation

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