When a repressor binds to the operator site on the DNA it normally ________.
A. has no effect on transcription
B. terminates transcription that has already been initiated
C. inhibits the initiation of transcription
D. reduces the rate of transcription
Answer: C
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Answer the following statements true (T) or false (F)
1. A stigma is an organelle that pumps water out of the cell. 2. Sexual spores are also known as conidia. 3. Classification of fungi is based on the type of conidia that they produce. 4. Protozoa that move by means of pseudopodia are in a category known as Sarcodina. 5. Fungi can cause both infectious diseases and microbial intoxications.
Oceanography is the study of:
a. the living organisms that inhabit the sea. b. the oceans and their phenomena. c. the oceans and living organisms. d. the chemical makeup of the oceans. e. the interactions of marine organisms with their environment.
In addition to the nucleosome, DNA in a chromosome has several more levels of folding and
compaction. Indicate whether the statement is true or false.
Seedless vascular plants include all of the following EXCEPT
A. Psilotum-Pteridophytes. B. Sphagnum-Bryophyta. C. whisk ferns-Psilotophyta. D. horsetails-Sphenophyta.