#Question id: 10931
#Unit 7. System Physiology – Animal
A 24-year-old African-American man comes to the
emergency room 3 hr after the onset of severe back and chest pain. These
problems started while he was skiing. He lives in Los Angeles and had a previous
episode of these symptoms 5 years ago while visiting Wyoming. He is in obvious
pain. Laboratory studies show the following:
Hemoglobin
11
gm/dl
Leukocyte
count 22,000/μl3
Reticulocyte count 25%
What is the diagnosis of this patient?
#Question id: 2905
#Unit 2. Cellular Organization
With respect to X-chromosome inactivation, which, if any, of the following statements are not correct?
I. X-chromosome inactivation in mammals begins in the pre-implantation embryo
II. In humans all diploid cells that carry two normal X-chromosomes are subject to a random pattern of X-inactivation.
III. Once a decision has been made to inactivate an X chromosome (either the paternal or maternal X), all descendant cells show the same pattern of X-inactivation.
IV. The inactivated X chromosome becomes a highly condensed Barr body in which genes are silenced across the length of the chromosome.
#Question id: 5313
#Unit 11. Evolution and Behavior
Which of the following statements correctly describes one of the characteristics of alternative splicing in vertebrate genomes?
#Question id: 11624
#Unit 8. Inheritance Biology
The effect of gene interaction is that one gene masks (hides) the effect of another gene at a different locus, a phenomenon known as
#Question id: 5407
#General Aptitude
The average age of husband, wife and their child 1 years ago was 23 years and that of wife and the child 2 years ago was 15 years. The present age of the husband (in years) is: