Which of the following amino acids is not one of the 20 common amino acids found in cells?
A) leucine
B) isoleucine
C) glutamine
D) proline
E) pyrrolysine
Answer: E
Biology & Microbiology
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A) from south to north B) from east to west C) from north to south D) from southwest to northeast
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During replication, which enzyme unwinds the two strands of the DNA molecule from one another?
A. Primases B. Helicases C. Unwindases D. Ligases
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Which of the following structures is involved in forming a cleavage furrow?
A) mitotic spindle B) metaphase plate C) contractile ring D) sister chromatids
Biology & Microbiology
The male gametophyte is also called an embryo sac. Indicate whether the statement is true or false
Biology & Microbiology