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alexdok [17]
3 years ago
5

Which of the following is correctly defined?

Biology
1 answer:
kobusy [5.1K]3 years ago
6 0

Answer:

both b and c I think..........

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What is the role of calcium in muscle contractions?
Firdavs [7]

Answer:

Inside the muscle, calcium facilitates the interaction between actin and myosin during contractions (2,6). ... Calcium binds to the troponin, causing a position change in tropomyosin, exposing the actin sites that myosin will attach to for a muscle contraction (5,6). Blood Clotting. Without calcium blood would not clot.

Explanation:

5 0
3 years ago
What happens during the initiation step of DNA transcription? A ribosome attaches to the initiation codon of a completed mRNA st
Amanda [17]

Answer:

<u>A portion of the DNA unwinds and RNA polymerase attaches to the DNA within the transcription bubble.</u>

Explanation:

Transcription is the process in which DNA template is used to synthesize  mRNA.

There are three steps of transcription:

  • <u>Initiation</u>

It is the process in  which a portion of DNA unwinds and RNA polymerase binds to the promotor region on the DNA.

  • <u>Elongation</u>

It is the process in which RNA polymerase moves along the DNA template and synthesizes mRNA. During this process, unwinding of double stranded DNA takes place.

  • <u>Termination</u>

As the RNA polymerase moves along the DNA template, it finally reaches a termination signal and then stops synthesizing. It is followed by the detachment of the newly formed mRNA and RNA polymerase from the DNA.

<u>QUESTION:</u>

  • <u> A ribosome attaches to the initiation codon of a completed mRNA strand.</u>

This is the incorrect answer choice as this process does not happen in the process of transcription. This event happens<u> in the process of translation in which mRNA is used to synthesize proteins or amino acids. mRNA attaches to ribosome during this process.</u>

  • <u>RNA polymerase moves along the template strand of the DNA creating an mRNA strand.</u>

This is the incorrect answer choice as this event takes place in the process of elongation.

  • <u>A portion of the DNA unwinds and RNA polymerase attaches to the DNA within the transcription bubble.</u>

This is the<u> correct answer choice as this event takes place in the process of initiation of transcription</u>

  • <u>The mRNA detaches from the RNA polymerase as the RNA polymerase leaves the DNA strand.</u>

This is the incorrect answer choice. This event takes place in the event of termination of transcription.

3 0
3 years ago
Describe how energy flows through an energy pyramid? Write your answer in the space provided below.
o-na [289]

Answer:

Depending on the food pyramid, on the side there may be something that says decomposers. These eat from all of the sections of the pyramid.

Energy flows from the bottom to the top, and then to the side with the decomposer.

6 0
3 years ago
The dark reaction of photosynthesis is also called the
mr_godi [17]
<span> It is called the Calvin Benison Cycle</span>
5 0
3 years ago
Read 2 more answers
A
pickupchik [31]

Answer:

Punnett square

Explanation:

6 0
3 years ago
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