Dihybrid cross
What will be an ideal response?
Cross of two individuals that differ in two traits
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Chargaff found several facts about the base composition of DNA. One of these rules is
a. There is a 1:1 relationship between G and T. b. There is a 2:1 relationship between purines and pyrimidines. c. The amount of A equals the amount of T. d. The amount of purines is half the amount of pyrimidines. e. None of these are true.
Microscopic fossils are also called microfossils
A. These minerals are needed as cofactors for enzymes needed in photosynthesis. B. These minerals are needed as cofactors for enzymes needed in cellular respiration. C. These skeletons allow for more complex reactions to take place inside the cell. D. These skeletons probably afforded them protection from being eaten. E. These minerals are necessary to maintain genome integrity.
When a muscle fiber is relaxed, why can’t
myosin bind to actin?
a. ATP is not present b. the myosin binding site on actin is blocked c. the myosin head is in the wrong shape for binding d. the actin is in the wrong orientation for myosin binding e. the myosin head is 180 degrees from its attachment configuration
Each of the following is true about plant rosettes except
A) rosettes are localized in the plasma membrane. B) rosettes are cellulose-synthesizing enzyme complexes. C) rosette deposition of cellulose microfibrils is directed by microtubules. D) rosettes move in the plasma membrane to deposit growing cellulose microfibrils. E) rosettes deposit cellulose microfibrils only in the middle lamella.