The earliest evidence of biochemical reactions by living cells dates to about ____ billion years ago
a. 0.5
b. 1
c. 1.5
d. 2
e. 3.7
ANSWER: e
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What condition has been the target of over half the gene therapy trials performed so far?
A. SCIDS B. Cancer C. Cardiovascular disease D. Osteogenesis imperfect E. Diabetes
Which of the following is TRUE concerning the structure and function of enzymes?
A) All enzymes bind cofactors necessary for their function. B) An apoenzyme is a combination of a cofactor bound to a holoenzyme. C) Enzymes can function at a wide range of pH. D) Competitive inhibition of an enzyme occurs when an inhibitor binds to an allosteric site on the enzyme. E) After an enzyme has catalyzed a reaction, it resumes its original shape and can interact with a new substrate molecule.
How does a Philadelphia chromosome occur, and what condition does it cause?
What will be an ideal response?
A restriction enzyme that uses a six (6 ) base recognition sequence will cut DNA, on average, every ________ bases, if all four nucleotides are present in equal proportions
A) 4096 B) 256 C) 5000 D) 500 E) 1296