Biology, 08.06.2020 10:57 beelcypher
01. which arm of tRNA can act as a binding site for ribosomes?
02. Cellular DNA is considered much more stable than the RNA because of:
-anti-parallel nature
-Presence of thymine than uracil
-Extensive repair mechanisms
-none of the above
03. Topoisomerases can break and ligate two broken DNA strands:
-true
-false
04. Renaturation of DNA will result in:
-Hypochromic effect
-Hyperchromic effect
-both
-none
05.A non –coding regulatory DNA sequence that is bound by a regulatory protein can be:
-promoter
-structural genes
-operator
-all
06.In addition to complimentary pairing plays an important role in selection of correct bases:
-Base stacking interactions
-Hydrogen bonding
-Base pair geometry
-none
07.The lagging strand of DNA is copied in short pieces because:
-d. DNA polymerase can synthesize only in one direction
-to decrease mutation rates
-limited space
-to make proof reading easier
Answers: 1
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1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.
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01. which arm of tRNA can act as a binding site for ribosomes?
02. Cellular DNA is considered much...
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