Which of the following proteins is involved in synthesizing messenger RNA in eukaryotes?

A. RNA polymerase I
B. RNA polymerase II
C. RNA polymerase III
D. sigma factor
E. both RNA polymerase I and III


B. RNA polymerase II

Biology & Microbiology

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Underground stems are called __________, and they may store __________

a. taproots; starch b. taproots; toxins c. tubers; starch d. tubers; toxins

Biology & Microbiology

Photoperiodism is the

a. duration of flowering in a plant. b. amount of light needed by a plant to exhibit normal growth. c. biological response of a plant to a change in the length of daylight relative to darkness. d. light phase of photosynthesis during which photolysis of water occurs. e. time of the day when light shines.

Biology & Microbiology

Answer questions 96–100 with reference to the muscles listed

below. a. pectoralis major b. trapezius c. quadriceps femoris d. triceps e. gastrocnemius D 96. This is a principal muscle of the anterior upper leg. M 97. This muscle is located on the upper shoulder. M 98. This muscle opposes the biceps. D 99. The Achilles tendon attaches this muscle to the heel bones. M 100. This is a major muscle in the chest.

Biology & Microbiology

In Drosophila and Lepidoptera, sex-chromosome mosaicism produces what type of sexually ambiguous phenotype?

What will be an ideal response?

Biology & Microbiology