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3 years ago

To perform active transport , cell use

Biology

2 answers:

KatRina [158]3 years ago

7 0

To perform active transport, cells use ATP

Ksivusya [100]3 years ago

5 0

ATP and transport proteins

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All muscle types will respond to an electrical stimulus because all muscle cells are _________.

irakobra [83]

Answer:

excitable

Explanation:

All muscle types will respond to an electrical stimulus because all muscle cells are excitable.

Excitability is response of muscle to signal which delivered through the motor neuron.

Excitability is stretching of muscles.

The contraction and relaxation of muscle occur in following way:

Muscle contraction begins with signal. The contraction occur when nervous system send signals. The impulse which is called signal is travel through a motor neuron.

The whole process include following three steps:

1) Message is traveled from nervous to muscular system and trigger the chemical reaction.

2) This chemical reaction causes the muscle fibers to reorganize in such a way that shorter the length of them which is called contraction.

3) when this signal is no longer remain , reverse chemical process occur and muscles relax.

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3 years ago

The trp and lac operons are regulated in various ways. how do bacteria regulate transcription of these operons?

Vlada [557]

Operon is not transcribed:

-lac operon: lactose absent

-trp operon: tryptophan present

Positive control transcription of Operon does not speed it up:

Lactose and glucose are present, -lac operon

Tryptophan is lacking in the -trp operon.

Operon is transcribed quickly through positive control:

-lac operon: lactose present, glucose not

Only negative control is used to regulate the trp operon. The operon genes are not transcribed when tryptophan is present.

Both positive control and negative control are used to control the lac operon.

Negative control: —Transcription is inhibited when lactose is missing due to the activity of the repressor protein.

—The repressor protein is deactivated and transcription is triggered when lactose is present.

Positive control: —In the absence of glucose, another regulatory protein (CAP) attaches to the lac operon's promoter, speeding up transcription in the presence of lactose.

Learn more about lac operons here:

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7 0

2 years ago

This is the practice of producing a genetically identical cell or organism.

antoniya [11.8K]

A. cloning
The rest relate to the change or identification of genes.

6 0

3 years ago

Read 2 more answers

How many glucose molecules would be produced if 24 carbon dioxide and 24 water molecules were used in photosynthesis

almond37 [142]

Photosynthesis is the process in which plants make their own food using light energy from sunlight in the leaves of the plants. The equation of photosynthesis states that the combination of carbon dioxide, water, and light energy produces a carbohydrate (glucose) and oxygen.
6CO2 + 6H2O +light energy = C6H12O6 + 6O2.
From the equation, six molecules of carbon dioxide and six molecules of water produces one molecule of glucose.
Therefore, 24 molecules of carbon dioxide and 24 molecules of water would produce or yield 4 molecules of glucose.

8 0

4 years ago

Read 2 more answers

What pH did you estimate for ammonia using the pHydrion paper?

klio [65]

Answer: Between 8 and 14

Explanation: Ammonia is an inorganic compound of formula NH₃. Also known as ammonium hydroxide, it behaves as a weak base.

pHydrion paper is a chemical test indicator, i.e., it indicates the pH of a substance.

If inserted in Ammonia, pHydrion will indicate a range of 8 to 14 because in pH scale, indication of base is over 8 and up to 14. The exact number depends on the hydrogen ion concentration of the substance.

6 0

4 years ago