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2 years ago

Cell walls are impermeable to transport of most materials required for bacterial nutrition.

Biology

2 answers:

mezya [45]2 years ago

8 0

The given statement is False.

The bacterial cells walls are composed of peptidoglycan, also known as murein. It comprises polysaccharide chains cross-linked by unusual peptides, involving D-amino acids. The bacterial cell walls are distinct from cell walls of fungi and plants that are made up of chitin and cellulose, respectively.

The cell walls in bacteria allow small molecules to pass through them freely, however, do not permit large molecules to pass through them, in this manner, it function as a coarse filter.

The main function of the cells wall is to sustain the shape of the cell and inhibit the cell from bursting due to osmotic pressure. The cell wall allows the components to pass, which are essential for bacterial nutrition.

rusak2 [61]2 years ago

8 0

The answer in true for this question.

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Do biological systems contradict the second law of thermodynamics? by taking energy from their surroundings and synthesizing lar

Bogdan [553]

Biological systems do not contradict the second law of thermodynamics. Even in this case, entropy is still always increasing. Biological systems can only decrease their own entropy by using copious amounts of energy and by increasing entropy in their surrounding environment. Also, unfavorable anabolism reactions are always paired with more favorable reactions, such as the use of ATP in order to make the overall Gibb's free energy of the reaction negative.

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3 years ago

As a cell grows, its _____ increases more than its _____.

Andru [333]

As a cell grows, its volume increases more than its surface area so the answer is C

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3 years ago

Question 8 of 10

jonny [76]

The purpose of control group 2 is to determine if the new drug was a possible method for getting well, i.e., option B.

<h3>What is way of testing medicines?</h3>

In a laboratory, drugs are first subjected to non-human tests. These laboratory tests are performed to determine a level of safety.

The results of these tests are then submitted to the United States Food and Drug Administration (FDA), which determines whether the treatment is safe enough to be studied in human volunteers.

There are various phases involving discovery, clinical trial, review, and safety monitoring.

The purpose of control group 2 is to determine if the new drug was a possible method for getting well

Thus, the correct option is B.

For more details regarding drug testing, visit:

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5 0

2 years ago

Read 2 more answers

Need help with this!!!

Alex73 [517]

<h2>Answer:</h2>

The correct answer is option D which is that endocrine control can control melatonin.

<h2>Explanation:</h2>

As melatonin is released from pineal gland which is a part of endocrine system.The endocrine system is a chemical messenger system which has glands, which secretes certain chemicals known as hormones.These hormone acts on different organs to control different metabolisms in body.So melatonin which is hormone can be controlled by the endocrine system.

7 0

3 years ago

At which stage of respiration does the co2 release take place?

LenKa [72]

<span>The process by which most living cells generate energy during the process of aerobic respiration. CO2 release takes place at the stage of krebs cycle.
</span>

So according to above explanation

Krebs cycle , is the correct answer

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3 years ago