Answer:
a)This is RNA polymerase performing transcription
Explanation:
We can see that the purple molecule is attached to a DNA molecule, and is producing an mRNA molecule from a template strand. This is the process of transcription
The enzyme that carries out the synthesis of an mRNA molecule is RNA polymerase.
If the molecule was a ribosome performing translation, we would expect a polypeptide chain to be produced rather than an mRNA, and that the template molecule would be mRNA
If the molecule was DNA polymerase, it would synthesising a DNA strand not mRNA
If the molecule was a DNA repair enzyme, it would be correcting errors, not synthesising mRNA.
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The correct answer is longitudinal.
The streamline body of roundworms allows them to move and glide in the soil. The longitudinal muscles of the body of roundworm contracts and relaxes that allows them to move forward. The roundworm becomes wider or it bends from one side and pushes its body to move forward.