A part of the promoter, called the TATA box, is said to be highly conserved in evolution. Which of the following might this illustrate?
A. The sequence is transcribed at the start of every gene.
B. Any mutation in the sequence is selected against.
C. The sequence does not mutate.
D. The sequence is found in many but not all promoters.
E. The sequence evolves very rapidly.
Ans: B. Any mutation in the sequence is selected against.
You might also like to view...
Oceans and the tropical rain forests contribute equally to global productivity
Indicate whether the statement is true or false.
The lack of blood flow to an organ, as in the case of a blood clot blocking an artery, is termed ____
What will be an ideal response?
The minimum number of genes necessary for the normal functioning of a free-living cellular organism is about
a. 100. b. 500. c. 1500. d. 5000. e. 13,000.
If you remove the peptidoglycan layer from a Gram-positive cell, it would still stain purple with a Gram stain.
Answer the following statement true (T) or false (F)