Which amino acid has no R group?
Glycine
Which amino acid has a phenol R group?
Tyr
one way enzymes catalyze a reaction?
lowering the activation energy
How many types of amino acids are there?
20
the process of making an identical copy of a section of DNA, using existing DNA as a template for the synthesis of new DNA strands.
DNA replication
Which amino acid has the R group with a single methyl group?
Alanine
Which amino acid has a R group CH2-OH?
Ser
what is an active site?
where the substrate binds to the enzyme
How are amino acids linked together?
dehydration synethsis
a type of weak chemical bond formed between the nitrogenous bases on opposite strands of DNA.

hydrogen bonding
Which amino acid has the R group has a ring containing an amine?
Proline
Which amino acid has the R group with a thiol group?
Cys
do enzyme catalyze exergonic or endogonic reactions?
exergonic
How do many proteins act?
as enzymes or biological catalysts.
what are the 4 nucleotides?
A,T,G,C
Which amino acid has the R group with a sulfur bridge?
Methionine
Which amino acid has the R group that contains one methyl and one amide?
Asn
what kind of bonds are involved in the initial binding of substrates to the active site?
non covalent bonds
Enzymes have what shape?
a glob shape. Globular
Who are the two scientists who are accredited on saying that DNA is a double helix in 1953?
James Watson and Francis Crick, in 1953
Which amino acid has a branched R group?
Leucine
Which amino acid has the R group with two methyls and one amide?
Gln
what is a cofactor?
a non protein part of the enzyme that some enzymes require to be active
what four things are bonded to the central carbon of every amino acid?
Amino group- NH2, Carboxyl group- COOH, Hydrogen group- H, and Side group- R
What does DNA helicase do?
unzip the DNA