Which of the following statements about DNA is incorrect: Select one: a. it contains 2 chains b. it contains deoxyribose sugars c. it is replicated in preparation for cell division d. it never leaves...

Which of the following statements about DNA is incorrect:

Select one:

a. it contains 2 chains

b. it contains deoxyribose sugars

c. it is replicated in preparation for cell division

d. it never leaves the nucleus

e. it has the base uracil instead of thymine

When focusing a slide, one should begin with the high power objective and work down to the scanning objective.

Select one:

True

False

he molecules in the cell membrane that serve as receptors or binding sites for hormones or other chemical messengers are the:

Select one:

a. glycoproteins

b. carbohydrates

c. cholesterol molecules

d. proteins

e. lipids