Fast-twitch muscle fibers ________.
Fill in the blank(s) with the appropriate word(s).
Ans: have few mitochondria
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Which one of the following is not an example of combinatorial control of eukaryotic gene expression?
A. The HAT activity of the yeast Gcn5 protein alters chromatin structure. B. Fos-Jun heterodimers bind DNA with higher affinity than Fos-Fos or Jun-Jun homodimers. C. Two regulatory proteins that form homo- and heterodimers bind to three different regulatory sites. D. Expression of the even-skipped gene product of the fruit fly is differentially controlled by the uneven distribution of four transcription factors.
Which of the following fossils is most like a
lobe-finned fish?
a. Tiktaalik b. Icthyostega c. Eusthenopteron d. Sinosauropteryx e. Confuciusornis
Which of the following is a characteristic of uracil?
a. It has the ability to bond with adenine. b. It has the ability to bond with guanine. c. It is a purine. d. It has the ability to bond with cytosine. e. It contains two nitrogenous rings.
Work of which of the following scientists resulted in an end to the theory of spontaneous generation
A. Elhrich B. Jenner C. Koch D. Hooke E. Pasteur