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3 years ago

What does helicase do?

Biology

2 answers:

Rufina [12.5K]3 years ago

6 0

Answer:

Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes. There are DNA and RNA helicases. DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied.

Harman [31]3 years ago

6 0

Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid

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Why are genes contained in compact chromatin not expressed?

Vikentia [17]

Answer: They are not expressed because A gene is dominant over the recessive gene.

Explanation:

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3 years ago

In the DNA helix, which part of the nucleotide forms the sides of the ladder, the backbone? A. Pentose sugar and Nitrogen base B

astra-53 [7]

C, it is made up of a phosphate group and a sugar. nitrogen bases are in the middle; think of them as the “steps” in the ladder.

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3 years ago

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What does the electrochemical communication do in the body?

erastova [34]

The Nervous system of the body consists of all the nerve cells. It is the body's "speedy" electrochemical communication system.
every neuron (nerve cell) has a long process known as 'axon' which is used to contact the next cell in the circuit. The receiving cell (another neuron) has small processes called 'dendrites' which are contacted by the axon. Now the neurons, like all other cells in the body, are enclosed by a selectively permeable cell membrane - which means it allows certain chemicals to pass through, while others are prevented from entering or leaving the cell

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3 years ago

Which of the following is not a key advantage provided by the exoskeleton of terrestrial arthropods?

Nataly_w [17]

Answer:

Grows with the arthropod throughout its life

Explanation:

The exoskeleton, unlike the human skeleton, is a tough but flexible layer that covers the body of many animals, especially invertebrates, and protists. It is important to remember that this is not formed by bones. According to the animal its composition changes.

The main function of the exoskeleton is primarily to protect the tissue and internal organs of the living being, but in some cases it prevents the growth of animals. That in these cases need to perform the ecdysis, a process in which the animal leaves its exoskeleton to increase in size, as an example of this process we have the cicada. In this context, we can confirm that the exoskeleton does not grow with arthropod throughout its life.

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4 years ago

Use the numbers 1, 2, 3, 4, and 5 to place the protein creation steps below in the correct order. Ribosome attaches to the mRNA.

kirza4 [7]

Answer: The correct sequence for the protein creation is as follows-

1) Information is transcribed in DNA to mRNA.

2) mRNA leaves the nucleus.

3) Ribosome attaches to the mRNA.

4) tRNA anticodon carries an amino acid that compliments the mRNA codon.

5) The chain of amino acids forms a protein.

According to the Central Dogma, the genetic information is transferred from DNA to mRNA to Proteins.

The first step is transcription in which DNA is converted to mRNA with the help of enzyme RNA polymerase. In eukaryotic cells, this process occurs in the nucleus.

This is followed by translation, which takes place in the cytoplasm when mRNA leaves the nucleus.

Ribosomes are the specialized organelles, which act as the site for protein synthesis ( translation).

Ribosomes attach to the mRNA. tRNA brings amino acid, which has anticodon complementary to the codon present in the mRNA. A chain of amino acids is thus synthesized, which is called Protein.

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3 years ago

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