Which of the following forms the skeleton of invertebrate chordates?
a. pharynx
b. neural crest
c. oral hood
d. notochord
e. cranium
D
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Steroid hormomes are an example of an effector which regulates regulatory transcription factor activity
Indicate whether the statement is true or false
Meiosis occurs in the ____
a. testes only b. ovaries only c. somatic cells d. synaptonemal complex e. gonads
Which of the following statements is
INCORRECT?
a. Viruses are not able to move by themselves. b. Viruses are not able to reproduce by themselves. c. Viruses are not structurally organized. d. Viruses are nonliving particles. e. Viruses contain instructions to manufacture themselves
Which of the following is the binding site for RNA
polymerase on the DNA molecule? a. structural gene 1 b. repressor gene c. promoter sequence d. operator sequence e. region between an operator and the first structural gene