Suppose a plant has a unique photosynthetic pigment and the leaves of this plant appear to be reddish yellow. What wavelengths of visible light are absorbed by this pigment?

A) red and yellow
B) blue and violet
C) green and yellow
D) blue, green, and red


B

Biology & Microbiology

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Arrange in the proper sequence those events that take place in the lac operon as lactose is introduced to a bacterial culture.

A. Step 2 B. Step 1 C. Step 3 D. Step 4

Biology & Microbiology

The protozoan Didinium feeds on other organisms by engulfing them. Why are bacteria, in general, unable to feed on other cells in this way?

What will be an ideal response?

Biology & Microbiology

The immediate ancestors of plants, animals and fungi are thought to be similar to some modern day ______ 

A. Protista. B. Bacteria. C. Archaea. D. Ciliates.

Biology & Microbiology

You attempt deletion mapping of a part of the promoter region of a particular gene. You remove a short sequence of nucleotides. Once the altered DNA is transfected into cells, the cells are able to transcribe the transfected DNA in a normal fashion. What do you conclude?

a) The deleted sequence has a moderate level of importance in promoting transcription. b) The sequence that was removed is not an essential part of the promoter. c) The sequence that was removed is an essential part of the promoter. d) The sequence that was deleted is an important determinant of the ability to transcribe the gene.

Biology & Microbiology