ATP serves as a common energy source for organisms because

(A) it is the smallest energy molecule
(B) it stores the least energy of any energy source
(C) its energy can be easily transferred to do cellular work
(D) it is extremely stable and can be stored in the cell for long periods of time
(E) traces of it have been found in fossils of ancient organisms dating back to the beginning of life on Earth


Answer: (C) its energy can be easily transferred to do cellular work

Biology & Microbiology

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Some ciliophora can discharge toxic threadlike darts called ________, which are used in capturing prey.

A. toxicysts B. toxipodia C. spicules D. spikes

Biology & Microbiology

In a conjugation experiment not all of the cells receiving two genes will demonstrate an altered phenotype for both genes. What is the most likely explanation of this phenomenon?

A. One gene is toxic to the cell B. Transferred genes must undergo recombination for genotypic conversion of the recipient cell and there is a possibility that only one gene will be recombined into the recipients chromosome C. The transferred DNA is rapidly degraded by the recipient cell and one gene can be degraded before it is recombined into the host chromosome D. It is not physically possible to recombine more than one gene into a single host genome per conjugation event

Biology & Microbiology

The level of ecological organization that incorporates abiotic factors is the

A) community. B) ecosystem. C) population. D) species. E) symbioses

Biology & Microbiology

How many genes are generally found for every million bases of DNA?

A. 10 B. 100 C. 1,000 D. 10,000 E. 100,000

Biology & Microbiology