The purpose of a photosystem is to convert ____
a. light energy into chemical energy
b. carbon dioxide into sugar
c. light energy into sugar
d. oxygen into carbon dioxide
e. light into oxygen
ANSWER: a
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A pyrimidine or purine base that has been joined with a ribose or deoxyribose sugar moiety is now termed a ________.
Fill in the blank(s) with the appropriate word(s).
The results of the treatment of 20 boys with SCID-X1 showed that ____
a. SCID-X1 can be cured through genetic engineering b. none of those treated were cured of the disease c. a bone marrow transplant can cure SCID-X1 d. our understanding of the human genome exceeds our ability to modify it e. the “treatment” caused numerous unforeseen complications.
Most freshwater algae belong to which group?
a. red algae b. green algae c. brown algae d. golden algae e. blue-green algae
Which feature has to be present in a protist in order to classify it as a photoautotroph?
A. the presence of a light-trapping pigment B. the presence of mitochondria within the cell C. the ability to synthesize inorganic compounds D. the presence of cellulose in the cell wall E. the ability to synthesize organic compounds