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3 years ago

What’s the function of the cell membrane ?

2 answers:

7 0

The cell membrane,has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.

pashok25 [27]3 years ago

5 0

Answer:

cell membranes protect and organize cells

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A scientist investigated DNA replication in two groups of cells, labeled A and B. She injected radioactively labeled nucleotides

hichkok12 [17]

Answer:

A is a eukaryotic cell while B is a prokaryotic cell

Explanation:

The researcher can conclude that cell A is eukaryotic while cell B is prokaryotic.

In eukaryotic cells, the DNA is located majorly in the nucleus and the replication of the DNA happens in the nucleus. Hence, it is only logical to find segments of new DNA in the nucleus of cell A during replication.

Prokaryotic cells, however, lack a nucleus. Their DNAs lie freely within the cytoplasm. This thus means that replication can only happen in the cytoplasm. Hence, it follows logically to find a new DNA segment in the cytoplasm of cell B.

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3 years ago

The macronutrient(s) whose main functions are to contribute the basic building blocks (amino acids) and to synthesize, grow, and

kaheart [24]

Answer:

Protein

Explanation:

This is because protein is a macronutrients and it is the building blocks which is important for building body mass and they are found through out the body, in the muscles, bones, skin, hair e.t.c

Protein can be gotten from both plants and animals.

The animal protein include meat, diary products, fishes e.t.c.

The plants protein include beans, r.t.c.

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3 years ago

Indicate which statements are true of proteins. Select all that apply. Multiple select question. They act as receptors on cells'

il63 [147K]

Answer:

React on cell surfaces, catalyze reactions.

8 0

3 years ago

I Need Help With This Answer Please?

NikAS [45]

The answer is B, matrix of the mitochondria

5 0

3 years ago

DNA replication is Group of answer choices conservative. a one-step process. semi-conservative. not carried out by enzymes. not

Alex787 [66]

Answer:

The correct answer is: semi-conservative.

Explanation:

DNA replication is an important process in which the DNA is duplicated before cell division so each daughter cell can have a copy of genetic material.

DNA replication is semi-conservative because one strand of DNA is new and the other one is the old strand. To replicate itself, the DNA double helix is opened, and then each strand serves as a model for the new strands.

DNA replication is not a one-step process, as it takes several complicated steps in which lots on enzymes participate (like DNA polymerase and DNA helicase).

DNA replication is also carried by prokaryotic cells, though it's a much simpler process.

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3 years ago