Alkapton urea is a familial disease that is autosomal recessive. The defective enzyme in affected individual prevents the metabolism of _____________
A) Procussic acid
B) Homogentisic acid
C) tyrosine
D) alkapton
E) phenolalanine
Ans: B) Homogentisic acid
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The biosynthetic pathway for chlorophyll includes approximately how many steps?
A. 3 B. 6 C. 10 D. 17 E. 40
Conjugative transposons
A. can be transferred from one bacterium to another by a phage mediated process. B. often express enzymes that degrade aromatic compounds. C. may be involved in the spread of antibiotic resistance in bacteria. D. All of the choices are correct.
________ and ________ are the two kinds of sugars found in bacterial cell walls.
Fill in the blank(s) with the appropriate word(s).
In plants, which of the following cells is (are)
diploid?
a. egg cell b. sperm cell c. spore cell d. root cell e. all of these cells are haploid