Adenine (A), thymine (T), guanine (G), and cytosine (C) are the ________ building blocks for DNA; they are organized in different combinations to code for all of the proteins needed to accomplish everything the cell does.
a. carbohydrate
b. nucleotide
c. protein
d. lipid
Ans: b. nucleotide
You might also like to view...
Echinoderms are characterized by bilateral symmetry in adults, a water vascular system, tube feet, and spiny skin.
a. true b. false
Which of the following is capable of resetting the thermostat of the body to cause a fever?
A) antigen B) perforin C) complement D) pyrogen
Ehlers–Danlos syndrome and scurvy both are characterized by defects in
A) fibronectin. B) desmosomes. C) collagen. D) dystrophin. E) elastin.
Beadle and Tatum irradiated Neurospora and initially grew the mutant strains on complete medium. How were they
able to determine the type of mutation for each strain? a. By growing the mold on a complete medium with extra vitamins and nutrients b. By growing the mold on minimal media supplemented with different combinations of amino acids and vitamins c. By growing the mold in its diploid form to see which traits were masked d. By comparing Neurospora to other species of mold e. By observing the marked differences in morphology between the different strains