Question

The reaction pyruvate + CoA + NAD + rightarrow acetyl CoA + Co2 + NADH, is catalyzed by pyruvate dehydrogenase. If an inhibitor of this enzyme was added to cells, then ___ levels in the cytoplasm would increase. A. Oxygen B. NADH C. Pyruvate D. Acetyl CoA E. CO2 Which of the following types cells is matched with the WRONG stem cell category? A. embryonic of stem cells: pluripotent B. embryonic germ cells: pluripotent C. hematopoietic stem cells: multipotent D. myeloid cell: unipotent E. zygote: totipotent Height (tallness) in humans is a polygenic trait. Assume the following: There are 4 genes that determine height (Aa, Bb, Cc, Dd). Each dominant allele (of each gene) adds 2 inches of height to an individual. The height of the recessive individual (aa, bb, cc, dd) is 5 feet. What is the height of a person with the genotype (AA, Bb, cc, DD)? A. 5 feet, 10 inches B. 5 feet, 8 inches C. 5 feet, 6 inches D. 5 feet, 4 inches E. 6 feet, 6 inches You are working in a Drosophi a lab, and find a larva with two anterior ends. Both a normal a larva and the mutant larva are shown below. What is the most likely explanation for the mutant larva phenotype? A. there is a mutation in the bicoid gene causing no functional Bicoid protein to be made B. the nurse cells that produce the Bicoid protein are defective so there is no protein at either end of the embryo C. there is a mutation in a homeotic gene D. there is a high concentration of the Bicoid protein at both ends of the mutant embryo E. a protein encoded by a segment polarity gene is not degraded correctly and accumulates in both ends of the embryo

Answer 1

82. B. NADH

83. D. Myeloid cell- unipotent.

Myeloid cells are type of haemopoitic stem cells that give rise to different cells such as erythrocytes, platelets, monocytes, basophills, eosinophills etc.

84. 1. 5 feet 10 inch.

85. D.There is a high concentration of Bicoid protien at both ends of mutant embryo.