Which of the following diseases is caused by the lack of a functional gene responsible for a specific enzyme?

(A) Down Syndrome
(B) Tay-Sachs disease
(C) Ricketts
(D) Malaria


Ans: (B) Tay-Sachs disease

Biology & Microbiology

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A digestive cavity in which food enters an opening at one end and passes through the animal in one direction as it is digested is called the

A. gastrovascular cavity. B. stomach. C. alimentary canal. D. epithelial cavity. E. intestine.

Biology & Microbiology

Bicarbonate ions are formed from a reaction

involving ___ and ___.

a. oxygen...carbon dioxide b. water...oxygen c. water...carbon dioxide d. glucose...water e. glucose...oxygen

Biology & Microbiology

The structure that people typically refer to as a

“mushroom” is in reality the a. basidiocarp. b. mycelium. c. ascocarp. d. hyphal mass. e. zygospore.

Biology & Microbiology

Also called an ovum; haploid cell that is usually fertilized by a sperm to form a diploid zygote.

What will be an ideal response?

Biology & Microbiology