The active site of an enzyme ____. A. is remote form the site of substrate attac

Question

The active site of an enzyme ____. A. is remote form the site of substrate attachment B. is converted to a product C. is the region where the reaction takes place D. increases the energy of reaction E. includes the entire enzyme In the lock-and-key model of enzyme actin, the enzyme active site is thought of as ___. A. a rigid, nonflexible shape that fits the substrate exactly B. an area of the enzyme that can adjust to fit the substrate shape C. a key-like shape that fits into a pocket of the substrate surface D. a hydrophilic area on the enzyme surface E. a lock that bars a noncompetitive inhibitor from reacting Consider the R groups of the following amino acids: cysteine: -CH_2SH; alanine: -CH_3; serine: -CH_2OH The name for the dipeptide shown below is _____. A. alanylcysteine b, alanylserine C. serylalanine D. serylcysteine E. serinealanine A compound that binds to an enzyme, and changes its shape so that a substrate cannot enter the active site, is called a(n) ______. A. coenzyme B. proenzyme C. steroid D. competitive inhibitor E. noncompetitive inhibitor Hydrophobic interactions help to stabilize the ____ structures(s) of a protein. A. primary B. secondary C. secondary and tertiary D. tertiary and quaternary E. secondary and quaternary The interactions that link the nucleotides in a nucleic acid are A. ionic bonds B. peptide bonds C. hydrogen bonds D. hydrophobic bonds E. phosphodiester bonds A DNA template having the base sequence -A G A T G A- would produce a mRNA with a base sequence of ____. A. -A G A T G A- B. -U C U A C U- C. -T C T U C T- D. -T C T A C A- E. -A C A U C A- In transcription _____. A. the mRNA produced is identical to the parent DNA B. uracil pairs with thymine C. a double helix containing one parent strand and one daughter strand is produced D. both strands of the DNA are copied E. the mRNA produced is complementary to one stand of the DNA

Explanation / Answer

18. Is the region where the reaction takes place

21. Non competitive Inhibitor

24. We know that adenine A pairs only with thymine T and cytosine C pairs only with guanine G therefore we can write the sequence of bases as option D TCTACA

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