BISC 101 ACTUAL EXAM QUESTIONS WITH
COMPLETE SOLUTIONS.
what is biology?
the natural science that studies life and living organisms
5 characteristics of life
life is cellular, life replicates, life processes information, life requires energy, life evolves
What are the building blocks of proteins?
amino acids
What do amino acids contain?
a carbon, a carboxyl group with OH, and an amino-group NH, and a side chain
what are the charges of the groups in amino acids in a neutral ph?
amino group: postive, NH3
carboxyl group: negative, COO-
What is a peptide bond?
covalent bond between two amino acids, the ending C bonds to the beginning N
what process occurs when a peptide bond is formed?
condensation, a water molecule is formed
what is a peptide called when it reaches 3 monomers?
oligopeptide (3 - 50)
,what is a polypeptide?
a protein! it has more that 50 amino acids
what differs the amino acids?
The side R chain
what are the negatively charged amino acids? are the acidic or basic?
Aspertate Asp (D), Glumamate Glu (E). acidic
what are the positively charged amino acids? are they acidic or basic?
Lysine Lys (K), Arginine Arg (R), Histidine His (H). Basic
what. makes an alcohol?
and OH on the R group
what are amides?
When there is an H2N - a little different than the original
what kind of bond can alcohols and amides form?
hydrogen bonds
what are aliphatic side chains?
Hydrocarbon side chains - H and C - they're non-polar!
what does a "thi" mean in an amino acid?
there's a sulphur
, what makes an aromatic amino acid?
a ring
what makes cysteine cys (C) special?
it can form disulphide bonds
where are charges going to be on a protein sequence?
Amino-terminus (N-terminus) is + and carboxyl terminus (C-terminus) is -
what does a polypeptide chain start with and end with?
Amino group begins, carboxyl group ends
why is a peptide bond rigid?
the electrons on the O and N create a partial double bond
what is a flexible backbone?
the free rotation around most bonds (not peptide bonds)
what are secondary structures?
alpha helix and beta pleated sheet and random coil (mix of the two). interactions (hydrogen
bonds) within the polypeptide backbone
what are tertiary structures?
Complete three-dimensional structure of a fully folded protein, with interaction of the side R
groups
how can tertiary structures be organized?
COMPLETE SOLUTIONS.
what is biology?
the natural science that studies life and living organisms
5 characteristics of life
life is cellular, life replicates, life processes information, life requires energy, life evolves
What are the building blocks of proteins?
amino acids
What do amino acids contain?
a carbon, a carboxyl group with OH, and an amino-group NH, and a side chain
what are the charges of the groups in amino acids in a neutral ph?
amino group: postive, NH3
carboxyl group: negative, COO-
What is a peptide bond?
covalent bond between two amino acids, the ending C bonds to the beginning N
what process occurs when a peptide bond is formed?
condensation, a water molecule is formed
what is a peptide called when it reaches 3 monomers?
oligopeptide (3 - 50)
,what is a polypeptide?
a protein! it has more that 50 amino acids
what differs the amino acids?
The side R chain
what are the negatively charged amino acids? are the acidic or basic?
Aspertate Asp (D), Glumamate Glu (E). acidic
what are the positively charged amino acids? are they acidic or basic?
Lysine Lys (K), Arginine Arg (R), Histidine His (H). Basic
what. makes an alcohol?
and OH on the R group
what are amides?
When there is an H2N - a little different than the original
what kind of bond can alcohols and amides form?
hydrogen bonds
what are aliphatic side chains?
Hydrocarbon side chains - H and C - they're non-polar!
what does a "thi" mean in an amino acid?
there's a sulphur
, what makes an aromatic amino acid?
a ring
what makes cysteine cys (C) special?
it can form disulphide bonds
where are charges going to be on a protein sequence?
Amino-terminus (N-terminus) is + and carboxyl terminus (C-terminus) is -
what does a polypeptide chain start with and end with?
Amino group begins, carboxyl group ends
why is a peptide bond rigid?
the electrons on the O and N create a partial double bond
what is a flexible backbone?
the free rotation around most bonds (not peptide bonds)
what are secondary structures?
alpha helix and beta pleated sheet and random coil (mix of the two). interactions (hydrogen
bonds) within the polypeptide backbone
what are tertiary structures?
Complete three-dimensional structure of a fully folded protein, with interaction of the side R
groups
how can tertiary structures be organized?
