Which of the following statements concerning proto-oncogenes is FALSE?
a. They are abnormal genes.
b. They code for growth factors.
c. They code for growth factor receptors.
d. They are involved in cancer.
e. They code for transcription factors.
A
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Which of the following is a difference between a purine and a pyrimidine?
a. Purines have a single ring structure. b. Pyrimidines cannot bind phosphate. c. Pyrimidines are smaller in size. d. Purines are only found in RNA.
Breaking actin-myosin bonds requires
a. ATP. b. ADP. c. calcium. d. phosphorus. e. sodium
What do both the C4 and CAM pathways of photosynthesis allow plants to do?
A) to perform photosynthesis in the absence of carbon dioxide B) to outcompete C3 plants in cool, dry conditions C) to keep stomata partially or completely closed during the hottest parts of the day D) to take up carbon dioxide at night and then store it as an acid until the day
What are the conserved features of a bacterial promoter?
What will be an ideal response?