In Drosophila, the hunchback gene encodes a protein (HB) that has a role in the development of the thorax. In the zygote and embryo, the expression of hunchback is stimulated by high concentrations of Bicoid protein. Which of the following is accurate about the expression of hunchback in the Drosophila embryo?
A. The HB protein is produced throughout the embryo.
B. The HB protein is produced only in the anterior half of the embryo.
C. The HB protein is produced only in the posterior half of the embryo.
D. The HB protein is produced in the middle of the embryo; but is not produced in the anterior or posterior end.
E. No HB protein is produced in the embryo.
B. The HB protein is produced only in the anterior half of the embryo.
You might also like to view...
What occurs when an inducer is added to an environment containing an organism with a metabolic pathway controlled by a repressor?
A) The inducer combines with the repressor and activates the pathway. B) The inducer combines with the repressor and inactivates the pathway. C) The inducer combines with the substrate and blocks induction. D) The inducer does not combine with, but functions as a chaperone molecule for, the enzyme-substrate complex.
Select all of the following that are names of immature stages in various animals.
_____ nauplius. _____ trochophore ._____ caterpillar. _____ nymph. _____ swimmeret.
All of the following are true of the process of
phosphorylation EXCEPT that a. a molecule gains a phosphate group. b. a molecule loses a phosphate group. c. molecules become less stable. d. it is used to prime molecules to react. e. it produces ADP from ATP.
What are lysosomes
What will be an ideal response?