Which one of the following nitrogenous bases is not found in an RNA molecule?

A) adenine
B) guanine
C) thymine
D) uracil


C) thymine

Biology & Microbiology

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After an infectious disease has been identified in a population, the next step is to correlate the disease outbreak with a specific organism.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Rubisco has 16 subunits joined together to make a functional unit. Eight of the subunits are large, the

other 8 are small. What does this tell you about this protein's structure?

a. It is an example of a protein having quaternary structure. b. The protein has tertiary structure and domains but no quaternary structure. c. The primary sequence of all 16 subunits is identical, which is a unique property of enzymes participating in photosynthesis. d. The subunits each have 8 alpha helices in order to bind to CO2 and RuBP. e. It's an enzyme that is extremely resistant to denaturation.

Biology & Microbiology

Why do eukaryotic chromosomes have multiple origins of replication? Design an experiment that allows you to test your hypothesis

What will be an ideal response?

Biology & Microbiology

Robert Paine conducted studies of rocky intertidal communities on the coast of Washington and in the Gulf of California. Paine showed that removal of __________ consumers could result in reduction of the number of their resource species.

A) predator B) herbivore C) both predator and herbivore

Biology & Microbiology