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mariarad [96]
3 years ago
8

What happens to RNA polymerase II after it has completed transcription of a gene? a. It begins transcribing the next gene on the

chromosome. b. It is free to bind to another promoter and begin transcription. c. It is degraded. d. It joins with another RNA polymerase to carry out transcription.
Biology
1 answer:
Over [174]3 years ago
7 0

The correct answer is: b. It is free to bind to another promoter and begin transcription

Transcription is the first step of gene expression in which DNA molecule is copied (transcribed) into RNA (mRNA) by RNA polymerase. The process of transcription is divided into three phases:

1. Initiation

• RNA polymerase with transcriptional factors bind to gene promoter  

• RNA polymerase unwinds DNA double helix (transcription bubble is formed)

2. Elongation

• RNA polymerases adds nucleotides complementary to DNA  

3. Termination

• RNA polymerase gets to stop codon (transcribes a sequence of DNA known as a terminator)

• Formed complementary RNA strand is released from DNA-RNA complex.

RNA polymerase is also released and can transcribe some other gene by binding to its promotor. RNA polymerase will transcribe just the genes whose products are needed at a particular moment.

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After you eat lunch, nerve cells in your stomach respond to the distension (the stimulus) resulting from the food. This is best
strojnjashka [21]

Answer:

stimulus, control center

Explanation:

The control center is the main nervous system of the brain that is used to carry out different sensory, the motor and integration of data.

The stimulus control is the behavioral control that is described as the situations where behavior is triggered by the presence or the absence of any stimulus. Stimulus is the functional reaction in a tissue or any organ.

In the context, the nerve cells in the stomach responds to the stimulus that results from the foods after eating food is a mechanism between the stimulus and the control center.

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In an ecosystem, energy from the Sun is transferred by way of _____.
Lorico [155]

Answer: food chains or webs

In an ecosystem, energy from the sun is transferred by the way of food chains or webs. A food chain is a linear sequence of organisms through which food and energy is passed as one organism eats the another. A food web is the interconnection or relation of food chains. In a food chain energy is distributed among the trophic levels. Plants are primary producers which traps energy from sun for photosynthesis and belong to first trophic level in the food chain. The energy of sun present in plants is transferred to subsequent higher trophic levels when plants are consumed by other organisms.


4 0
3 years ago
Read 2 more answers
Tall height is dominant to short height in pea plants. You have a tall pea plant that you cross with a short pea plant. What is
zheka24 [161]

Answer:

The tall parent was heterozygous

Explanation:

If tall height is dominant to short height the only genotype possible for short height is hh, while there are two possible genotypes for tall height, Hh and HH. When HH is crossed with hh all the offspring are Hh, but if Hh is crossed with hh, a quarter of the offspring is HH, a quarter is hh and half is Hh. If the tall pea plants were HH there would only be tall offspring, but because there are some short offspring we know that the tall pea plants must have a genotype of Hh.  

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