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2 years ago

Which is RNA polymerase binding site on a typical gene?

2 answers:

7 0

The correct answer is A, the "promoter" site is the RNA polymerase binding site on a typical gene. This is how the process of gene expression begins. The RNA polymerase (a protein that builds RNA) binds to the promoter site of the DNA strand. It then begins the process of 'transcribing' the DNA code into an RNA strand, which can then be 'translated' into an amino acid chain to form a protein, which is the expression of the gene.

Law Incorporation [45]2 years ago

7 0

"promoter" refers to the RNA polymerase binding site

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Some people have low levels of calcium circulating in the blood, a condition known as hypocalcemia. while for many this disorder

kap26 [50]

Answer:

low level of calcium would result in fewer signals sent between pre and post synaptic cells.

Explanation:

The calcium has a main role in signal transmission mechanism and here is the mechanism :

1-the impulse reaches the synapse (depolarization which is a voltage change).

2-the voltage gated calcium channels open and let calcium flow into the cell.

3-the calcium causes the synaptic vesicles to rupture and release chemical transmitters which cross the synaptic cleft and finally bind to receptors on the post synaptic cell (transmitting the signal)

so it's obvious that if calcium concentration decreases, the signal transmission also decreases.

8 0

2 years ago

What kind of channels are located in the input region?

tamaranim1 [39]

Answer:

The correct answer is option B ( ligand gated channels opened by neurotransmitter molecules).

Explanation:

Input region or postsynaptic region or dendrite is the site of neuron cell which receives the impulse from the pre-synaptic neuron at the synaptic junction.

The cell membrane of the dendrite is embedded with ligand-gated channels which opens up in response to the ligand (neurotransmitters) produced by the neurotransmitter vesicle of axon or output region of neuron.

The neuromuscular junction is such a case where acetylcholine receptors present in the dendrite opens in the presence of acetylcholine.

Thus, option B ( ligand-gated channels opened by neurotransmitter molecules) is the correct option.

8 0

2 years ago

Match the following

Allushta [10]

Answer:

1. Sewage

2. diarrhea

3. atmosphere

4. 100 gallons of water

5. agricultural pollution

6. water cycle

7. water

Explanation:

7 0

2 years ago

Chemicals such as carbon and

IceJOKER [234]

Answer:

flows, cycles

Explanation:

4 0

2 years ago

Interphase is the part of the cell cycle during which these phases occur:

Nostrana [21]

Answer:

The correct answer is - A. Growth 1, Synthesis, Growth 2.

Explanation:

The cell cycle has three important phases Interphase, M -phase and cytokinesis. Interphase is the laongest phase of eukaryotic cell cycle. This phase shows no observational change in the cell, however, it collects nutrients, generates protein and replicates DNA and prepare the cell for the M- phase.

Interphase has 3 phases G1, S, and G2 phase. G1 phase is the phase that collects nutrients and increase the size of the cell for the cell division. S phase or synthesis phase is the phase takes maximum time in cell divivon and acompanied by protein generation, duplication of the genetic material. G2 phase is preparatory phase that prepeare the cell before the cell enter in the M - phase.

4 0

2 years ago