The carbon atoms in cellulose found in a log originally came from absorbed by the plant.

A. glucose in the roots,
B. oxygen in the atmosphere,
C. water in the soil,
D. carbon dioxide in the air,
E. nutrients in the soil,


D. carbon dioxide in the air,

Biology & Microbiology

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Ribosomes are made up of:

A. only RNA molecules. B. only DNA molecules. C. DNA and RNA. D. protein and RNA. E. only protein molecules.

Biology & Microbiology

Antiseptic surgery was pioneered by

A. Kitasato. B. Pasteur. C. Jenner. D. Lister.

Biology & Microbiology

The energy for active transport of substances into and out of plant cells is provided by _________.

A. Phloem B. ADP C. ATP D. Voltage E. Water

Biology & Microbiology

Many bacterial pathogens can resist the action of penicillin by

A) Inactivating it with the enzyme penicillinase B) Pumping it out with efflux pumps C) Preventing the entry into the cell D) Using an alternate metabolic pathway drug

Biology & Microbiology