Which of the following is NOT a part of the mitotic spindle apparatus in plants?
A. centrioles
B. tubulin proteins
C. astral microtubules
D. kinetochore microtubules
E. centrosome
Answer: A
Biology & Microbiology
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How does a plant grow towards a light source?
What will be an ideal response?
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Placental mammals appeared during the _____ period.
A. Jurassic B. Triassic C. Tertiary D. Cretaceous E. Permian
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The site where a signal molecule binds to the surface of an enzyme is the ________ site.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
The lactose repressor
A. is transcribed with the structural lac genes. B. requires lactose for its transcription. C. is activated by binding lactose. D. is inactivated by binding lactose.
Biology & Microbiology