Bioinfomatics

Question 1

Homologs

Answer 1

1) Proteins that perform identical or very similar functions across species are called orthologs
2) Homologs that perform very different functions within the same species are called paralogs

Question 2

How many aromatic amino acids are there? Which?

Answer 2

3: (Try, W), (Phe, F), (Tyr, Y)

Question 3

How many essential amino acids are there? Which?

Answer 3

10: (Phe, F), (Val, V), (Thr, T), (Try, W), (IIe, I), (Met, M), (Arg, R), (Leu, L), (His, H), (Lys, K)

Question 4

How many amino acids are considered hydroxal containing amino acids?

Answer 4

3: Threonine, Serine, Tyrosine (T, S, Y)

Question 5

How many BCAAs are there?

Answer 5

Branched chain amino acids: 3

Valine, V
Leucine, L
Isoleucine, I

Question 6

How many hydrophobic AAs are there? Which?

Answer 6

A, G, V, L, I, M, W, F

Question 7

Arginine, Asparagine, Aspartate, Aspartic, Glutamine, Glutamic, initials and R groups

Answer 7

(Arg, R), (Asn, N), (Asp, D), (Asp, D), (Gln, Q), (Glu, E)

R has 3 carbons followed by a guanidinium
N has a carbon followed by an aminocarboxyl group
D has a carbon followed by a carboxylic acid group
Q has two carbons followed by an aminocarboxyl group

Question 8

If two peptides are similar they are called

Answer 8

homologs

Question 9

Identical sequences are called

Answer 9

homologs

Question 10

Orthologous sequences are

Answer 10

cross species peptides that are similar

Question 11

40% identity or larger is considered

Answer 11

STRONG homology