Which of the following specifies a single amino acid in a polypeptide chain?

A. the three-base sequence of mRNA

B. the complementarity of DNA and RNA

C. the aminoacyl-tRNA synthetase

D. the base sequence of the tRNA

Which of these is NOT a way, or a proposed way, to store nuclear fuel rods after they have been used in a nuclear reactor?

Why is it advantageous to a fungus to produce millions of spores?

materials must pass through a cells semi permeable membrane in order for energy to be utilized this process is called

The amount of energy in foods is measured in?

Can you get rabies from a dog that has been vaccinated

A person without a spleen a) cannot survive. B) cannot synthesize red blood cells. C) cannot synthesize white blood cells. D) may need antibiotic therapy. E) may need blood transfusions to prevent anemia.

What is it called when a person is in a state of deep unconsciousness from which he or she cannot be aroused?

To offset high levels of carbon dioxide which of the following is the most viable option? A. pump oxygen in using oxygen tanks B. include indoor plants C. take shorter or less breathes D. keep windows and doors closed

Steam power plants produce a large amount of extra steam. That steam is released as heat energy into the water surrounding the power plant.

Depending on the organism, the number of in a cell may change.