A shift in Earth’s climate is known as ____
a. global warming
b. global climate change
c. greenhouse effect
d. ozone effect
e. Earth atmospheric warming
ANSWER: b
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Which of the following is not a phase of the Calvin-Benson Cycle?
A. Carboxylation phase B. Oxidation phase C. Regeneration phase D. Reduction phase
The more condensed a part of a chromosome is, the more likely it is that the genes in that region will be active
Indicate whether the statement is true or false
You are given an experimental problem involving control of a gene's expression in the embryo of a particular species. One of your first questions is whether the gene's expression is controlled at the level of transcription or translation. Which of the following might best give you an answer?
a) You use an antibiotic known to prevent translation. b) You measure the quantity of the appropriate pre-mRNA in various cell types and find they are all the same. c) An analysis of amino acid production by the cell shows you that there is an increase at this stage of embryonic life. d) You assess the position and sequence of the promoter and enhancer for this gene. e) You explore whether there has been alternative splicing by examining amino acid sequences of very similar proteins.
Cells acquire low-density lipoproteins (LDLs) by
A) diffusion. B) receptor-mediated endocytosis. C) exocytosis. D) phagocytosis.