Explain the "wobble hypothesis" and why it allows a single tRNA to recognize more than one codon
What will be an ideal response?
The relaxed pairing at the third position of the codon and the first position of the anticodon are less constrained and do not need to follow the traditional base pair rules. This allows for a single tRNA to recognize multiple codons.
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What type of thinking is required?
What will be an ideal response?
A fish detects vibrations in the water by means of its ________, which contains numerous ________.
A. lateral line; thermoreceptors B. ear; statocysts C. skin; mechanoreceptors D. lateral line; hair cells E. swim bladder; stretch receptors
The second stage of cellular respiration, ________, takes place only in the mitochondria.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements about the structure of microtubules is false?
(a) Microtubules are built from protofilaments that come together to make a hollow structure. (b) The two ends of a protofilament are chemically distinct, with ?-tubulin exposed at one end and ?-tubulin exposed at the other end. (c) Within a microtubule, all protofilaments are arranged in the same orientation, giving the microtubule structural polarity. (d) ?-Tubulin and ?-tubulin are covalently bound to make the tubulin dimer that then assembles into protofilaments.