What is one difference between using restriction endonucleases and mechanical shearing of DNA?
A) Restriction endonucleases cut DNA at known specific sites while shearing occurs at random sites.
B) Restriction endonucleases cut DNA at random sites while shearing occurs at known specific sites.
C) DNA cut with restriction enzymes can be used for cloning and DNA broken by shearing cannot.
D) Restriction enzymes produce larger fragments on average than shearing.
A) Restriction endonucleases cut DNA at known specific sites while shearing occurs at random sites.
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Forms of the Ras protein found in tumors usually cause which of the following?
A) DNA replication to stop B) DNA replication to be hyperactive C) cell-to-cell adhesion to be nonfunctional D) cell division to cease E) excessive cell division
Annelids have _______, which are hair-like extensions anchored in their skin.
a. chaetae b. parapodia c. radula d. nephridia
The theory that describes how skeletal muscles contract is the ____
a. sarcomere shortening theory b. rigor mortis theory c. Z-line movement theory d. spring filament theory e. sliding filament theory
What is the first step in producing a transgenic animal?
A. inject the desired gene(s) into a donor egg B. transgenic organism produces offspring that have the desired gene which can then produce more transgenic offspring C. implantation of a donor egg into the host mother D. transgenic eggs are harvested from the surrogate mother