Which category of nutrient would be best described as compounds needed in small amounts in the diet to facilitate chemical reactions in the body?
A) lipids
B) enzymes
C) trace minerals
D) vitamins
Ans: D) vitamins
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It is your task to prove the chromosomal theory of inheritance in your cell biology class. Your task is limited by examining only one trait in Drosophila. You may use the tools of modern biotechnology to aid you in your progress. Which of the following would be least likely to help you in your endeavor?
A) examining a trait that is the genotype AA in all of the available parental stocks B) examining a trait that is the genotype AA or aa in all of the available parental stocks C) DNA sequence analysis D) protein sequencing E) genetic manipulation to add a marker to a particular chromosome in the germline
The walls of fungi contain
a. cellulose. b. lignin. c. chitin. d. pectin. e. protein
An amoeba, a protozoan that moves by pseudopodia, approaches a smaller protozoan and extends its pseudopodia (extensions of cytoplasm in plasma membrane) around the smaller protozoan. Once the amoeba's pseudopodia completely surrounds the other protozoan, the amoeba's plasma membrane pinches off by folding back into the amoeba and creating a vesicle containing the smaller protozoan. This vesicle is now within the amoeba itself and will soon fuse with other vesicles containing digestive enzymes. This is an example of
a. pinocytosis. b. exocytosis. c. osmosis. d. phagocytosis.
The main form of glucose repression in the lac operon is
A. induction. B. inducer exclusion. C. the CAP/cAMP system. D. repression.