In a molecule of DNA, adenine and thymine form _________ hydrogen bond(s) with each other, while guanine and cytosine form ________.
Fill in the blank(s) with the appropriate word(s).
two; three
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What organ or organs of a crocodile is/are
most like a mammal’s?
a. lungs b. kidneys c. heart d. eyes e. skin
You would like to induce a transversion mutation into a sequence of DNA. Which type of chemical mutagen would give you the best chance of inducing the correct mutation without causing transition mutations as well?
A) base analog B) deaminating agent C) oxidative agent D) alkylating agent E) intercalating agent
In which of the following groups are most mRNAs monocistronic?
A) bacteria B) archaea C) eukarya D) bacteria and archaea E) All mRNAs are monocistronic.
Fat absorption differs from protein and carbohydrate absorption because
A. fats enter lacteals rather than capillaries. B. fats are not broken down before they are absorbed. C. there are no enzymes involved in the breakdown of fats, so they are absorbed as fat molecules. D. glycerol cannot be absorbed by villi.