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3 years ago

Cells need energy in order to ________?

Biology

2 answers:

oksian1 [2.3K]3 years ago

7 0

D. All of the above.

lyudmila [28]3 years ago

4 0

C, reproduce.

Explination: cells don’t make molecules so we can rule that one out.
They don’t really change shape either. So the only option is C.

C is correct because cells use energy to reproduce through mitosis

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which of the following fields of science supports evolution? a. astronomy b.geology c.biology d. all of these

lara [203]

Answer:

Explanation:

biology of your talking about life evolution but all if your talking about mankind evolution and technology

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3 years ago

What phase of mitosis is pictured below?

Dmitrij [34]

Answer:

Its a Anaphase

because the chromatids of each chromosomes have separated and are moving towards the poles

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3 years ago

Who first called animal-like protists "animalcules" after examining a drop of pond water under a microscope?

Nonamiya [84]

The answer is Anton Von Leeuwenhoek

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3 years ago

Read 2 more answers

The concentration of N2 in blood at 37 °C (body temperature) and atmospheric pressure (partial pressure of N2 = 0.80 atm) is 0.0

devlian [24]

Answer:

volume = 0.285 L

Explanation:

Henry constant is given as

$Henry constant = \frac{C}{P}$

Where C is concentration

P is atmospheric pressure

$Henry\ constant = \frac{0.00056}{0.80} = 0.0007 M/atm$

when atmospheric pressure 4 atm

$solubility = K_H\times P$

$= 0.0007 \times 4 = 0.0028 M$

In 5 litere blood , moles of N_2 $= Molarity \times volume$

$= 0.0028 \times 5 = 0.014$

At surface moles $= 0.0056 \times 5 = 0.0028$

Moles of N_2 release = 0.014 - 0.0028 = 0.0112

Mass of $N_2 = 0.0112 \times 28 = 0.314 g$

T = 37 + 273 = 310 K

$VOLUME = \frac{nRT}{P}$

$= \frac{0.0112\times 0.0821\times 310}{1}$

volume = 0.285 L

6 0

3 years ago

Which of the following mutations could lead to constitutive expression of the genes of the lac operon? View Available Hint(s) Wh

Molodets [167]

Options for part A are as follows:

A) A mutation in the operator sequence

B) A mutation in the lac-Z gene

C) A mutation in the lac-Y gene

D) A super repressor mutation

Answer:

The correct answer:

Part a - A mutation in the operator sequence

Part b - It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part C. true.

Explanation:

part a:

If there is a mutation in the operator sequence leads to prevent binding of the repressor which leads to allowing constitutive expression of the genes various conditions.

part b:

The biological role of the lac operon makes sure that the cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment

Part c:

RNA polymerase cannot transcribe the structural genes due to the repressor binds to the lac operator, therefore, the proper function of the lac operon is possible when the placement of the operator sequence between the promotor and the structural genes.

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2 years ago