The lac operon is an example of a(n) _______ operon.
a) repressible
b) inducible
c) noninducible
d) constitutive
e) irrepressible
Ans: b) inducible
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Which three organelles are involved in the glycolate pathway?
A) lysosome, chloroplast, rough endoplasmic reticulum B) mitochondrion, nucleus, lysosome C) peroxisome, smooth endoplasmic reticulum, chloroplast D) peroxisome, chloroplast, mitochondrion E) Golgi complex, peroxisome, lysosome
The production of pollen, seeds, and flowers attributed to the widespread distribution of angiosperms. Why is the production of seeds an advantage?
A. It allows fertilization in the absence of water. B. It protects and nourishes the embryo. C. It promotes pollination. D. It allows fertilization in moist areas. E. It is necessary for sexual reproduction.
__________ is a response to changes in length of
night relative to length of day. Fill in the blank(s) with the appropriate word(s).
A DNA molecule is made up of:
a. lipids b. proteins c. nucleotides d. fatty acids e. carbohydrates