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Rus_ich [418]
3 years ago
12

Which of the following components is involved in the initiation of transcription?

Biology
1 answer:
sergey [27]3 years ago
8 0

Answer:

Promoter.

Explanation:

Transcription may be defined as the process of generation of the RNA molecule from the DNA template. The process of transcription includes initiation, elongation and termination.

Promoter may be defined as the region of DNA that are located in the upstream region. The initiation of transcription requires the promoter region that allows the binding of RNA polymerase at the initiation site.

Thus, the correct answer is option (3).

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Cillia are underlying hair-like projections comprised of
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Answer:

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3 years ago
Which ion most readily leaks across a neuron's membrane, helping to establish the resting potential? Which ion most readily leak
EastWind [94]

Answer:

K+

Explanation:

Leak channels are the gated channels that randomly open and close. The plasma membranes have many more potassium ion (K+) leak channels than the leak channels for other ions such as sodium ion. Also, the potassium ion leak channels are leakier than the sodium leak channels and allow exit of more and more K+ from the neurons. This makes the inside the neuron negative at rest and outside becomes more positive. In this way, the leakage of K+ across the K+ leak channels is mainly responsible for maintaining the resting potential.

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3 years ago
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PtichkaEL [24]
C. electron microscope
8 0
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One of the "triggers" proposed for the Cambrian explosion is a dramatic rise in oxygen concentrations that occurred in the ocean
ZanzabumX [31]

Answer:

1. Oxygen is an effective final electron acceptor in cellular respiration because of its high electronegativity.

2. Organisms that use it as a final electron acceptor can produce more usable energy than organisms that do not use oxygen, but only if it is available.

3. With more available energy, aerobic organisms can grow larger and move faster.

Explanation:

1. Cellular respiration is an aerobic pathway because oxygen is an electron acceptor. This process produces 38 molecules of ATP per glucose. The atomic elements that are positioned at the right of the periodic table have high electronegativities because they tend to be electron acceptors.  

2. The efficiency of energy production of aerobic respiration is much higher compared to the anaerobic respiration because this metabolic pathway (aerobic respiration) can produce 38 molecules of ATPs per glucose molecule, while anaerobic respiration produces only 2 ATPs by glucose.

3. A higher amount of available energy improves the metabolic profile of the organisms with aerobic respiration.

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Finding fossils in an area can help us learn what about that location?
hram777 [196]

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2 years ago
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