Step 3 in glycolysis requires the activity of phosphofructokinase to convert fructose 6-phosphate into fructose 1,6-bisphosphate. Which of the following molecules is an allosteric inhibitor of this enzyme?
(a) Pi
(b) AMP
(c) ADP
(d) ATP
(d) When ATP levels are high, the cell does not need to break down more glucose to generate ATP. Thus, with ATP acting as an allosteric inhibitor of a key glycolytic step, there is a rapid on–off switch for this pathway.
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Insertions and deletions of three base pairs:
A. change one codon and, therefore, only one amino acid in the protein sequence. B. do not disrupt the reading frame so the protein ends up completely normal. C. do not disrupt the reading frame so the protein will usually retain some degree of function. D. cause frameshifts that will change the reading frame and, therefore, the sequence of the protein. E. usually result in the expression of a truncated protein.
Which gland is associated with daily biorhythms?
a. pineal b. parathyroid c. thymus d. pituitary e. thymus
Information that takes the form of a testimonial is considered to be ________ evidence, not scientific evidence because it is not based on empirical evidence
Fill in the blank(s) with correct word
A resting neuron
A. has a positive charge inside and negative charge outside. B. has a negative charge inside and a positive charge outside. C. is positively charged at the dendrites and negatively charged at the axon. D. is nonpolar.