Cytological examination of resting and contracted muscle provides important support for the sliding filaments model for how skeletal muscle contracts. This evidence includes the observation that during contraction the
A) Z lines move farther apart.
B) lengths of the thick filaments shorten significantly.
C) lengths of the thin filaments shorten significantly.
D) I bands get longer.
E) H zone becomes narrower.
Chapter Section: 14.4
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What benefit do root hairs provide to the plant? a. All of these choices
b. Increased nutrient absorbing ability c. Increase in surface area of the root system d. Increased water absorbing ability e. None of these choices.
What is a transgenic organism?
What will be an ideal response?
Humans are classified as hominoids because
A) they have larger bodies and bigger brains than other primates. B) all primates are classified in this group. C) they have hair during some part of their lives. D) at one point in their evolutionary history, they possessed a tail. E) aerobic metabolism uses hemoglobin for oxygen transport.
With fully automated Sanger sequencing, all four chain-terminating ddNTPs can be added into a single reaction. This is different from the traditional slab gel Sanger sequencing, where a different reaction had to be carried out for each ddNTP
The mixing of all four ddNTPs can be carried out because ______________. (a) the fully automated Sanger sequencing reactions are loaded onto a capillary gel. (b) the fully automated Sanger sequencing reactions utilize ddNTPs each labeled with a different fluorescent tag, which allows all four ddNTPs to be incorporated into a single molecule of DNA. (c) the fully automated Sanger sequencing reactions generate a set of products, each of which carries a single fluorescent tag whose color reveals the identity of the base that is at the end of the product. (d) the fully automated Sanger sequencing reactions do not require DNA polymerase because the bases are read as the DNA is pulled through a tiny pore at the end of the capillary gel.