Elongation of the microtubule occurs by the

A) addition of tubulin subunits to each end.
B) addition of tubulin subunits to the (+) end.
C) addition of the tubulin subunits to the (+) end but removal from the (-) end.
D) addition of G-actin subunits to the (+) end.
E) deletion of G-actin subunits from the (+) end.


A) addition of tubulin subunits to each end.

Biology & Microbiology

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The organism, Phytophthora infestans, responsible for the Irish Potato Famine of 1845 and 1847 belongs to 

A. Euglenozoa. B. Alveolata. C. Rhodophyta. D. Chlorophyta. E. Stramenopila.

Biology & Microbiology

All protists have:

a. chloroplasts only b. nuclei only c. mitochondria only d. both nuclei and mitochondria e. chloroplasts, nuclei, and mitochondria

Biology & Microbiology

Organic molecules have a carbon backbone and ________ such as -OH and -NH2 that can form hydrogen bonds.

A. chemical groups B. extension groups C. R groups D. functional groups

Biology & Microbiology

Only Photosystem I is required for (anoxygenic/cyclic/noncyclic) photophosphorylation to occur

What will be an ideal response?

Biology & Microbiology