shakadig

In DNA replication, ________ is read and copied. In transcription, _______ is read and copied, while ________ is not copied but has the same sequence as the synthesized RNA transcript except U instead of having T. In translation, _______ from mRNA determines a specific amino acid during protein synthesis, while _______ from tRNA has a complimentary sequence _______ to and brings the specific amino acid decided by __________ . What are A, B, C, D, E, F, AND G? The choice can be used more than one time. Choose one from (DNA template, coding strand, codon, anti-codon).

1. When a piece of paper is wet with water, it tears off easily. But the same paper if soaked in oil doesn’t lose strength. Why?

A deletion of nearly one hundred bases immediately upstream of the transcriptional start site in a gene sequence occurs, but the coding sequence of the protein remains unchanged. How will this mutation affect this gene?
A. Gene transcription will not occur.
B. Gene transcription will proceed normally.
C. Gene transcription will occur but translation will fail.
D. Gene transcription is unpredictable, and we cannot infer what might happen.

I think the answer in B, because it makes the most sense to me. Just wanting some further input on why I am either right or wrong. Thank You!!

A mutation within a gene sequence changes the start codon to a stop codon. How will this mutation affect the transcription of this gene?

A. Gene transcription will not occur, because it is stopped at the start codon.
B. Gene transcription will proceed normally.
C. Gene transcription will occur but will be down-regulated.
D. Gene transcription is unpredictable, and we cannot infer what might happen.

I think the answer is A, just want some clarification if I am either right or wrong. Thank you!

Infer: Why do you think stop and start codon signals are necessary for protein synthesis?

• Think and discuss: Consider the two following statements:

• The theory of evolution states that all living things had a single common ancestor.

• The translation between mRNA and amino acids is the same for all living things. (For example, the mRNA codon CAG codes for glutamine in all living things.)

Does the second statement support the theory of evolution? Explain why or why not.

If possible, discuss your answer with your teacher and classmates.