Which of the following types of microorganisms is photosynthetic?
A) yeast
B) virus
C) helminth
D) alga
Ans: D) alga
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Which of the following is not true of combinatorial control of the yeast mating-type?
A. Mcm1 and ?1 combine to activate ?-specific genes in haploid ? cells. B. Mcm1 and a1 combine to repress ?-specific genes in haploid a cells. C. Mcm1 and ?2 combine to repress a-specific genes in haploid ? cells. D. Mcm1 and ?2 combine to repress a-specific genes in diploid cells.
Answer the following statements true (T) or false (F)
1. Plant behavior is defined as response to stimuli. 2. Brassinosteroids produced by plants are closely related chemically to animal steroid hormones. 3. One reason auxins are called the "master plant hormones" is because they mostly work apart from other hormones. 4. One reason magnesium is important to plants is that it is part of the chlorophyll molecule.
Assume that a bacterial cell produces a Lac repressor that is able to bind to the operator sequence of the lac operon but
cannot bind allolactose. Explain the effect on transcription of the lac operon is the presence and absence of lactose.
What will be an ideal response?Receptors are made from membrane-bound polyribosomes.
a. true b. false