問題一覧
1
Alanine Three letter code and one letter code
Ala, A.
2
Arginine Three letter code and one letter code
Arg, R
3
Aspartic acid Three letter code and one letter code
Asp, D
4
Asparganins Three letter code and one letter code
Asn, N
5
Cysteine Three letter code and one letter code
Cys, C
6
Glutamic acid Three letter code and one letter code
Glu, E
7
Glutamine Three letter code and one letter code
Gin, Q
8
Glycine Three letter code and one letter code
Gly, G
9
Histidine Three letter code and one letter code
His, H
10
Isoleucine Three letter code and one letter code
Ile, I
11
Leucine Three letter code and one letter code
Leu, L
12
Lysine Three letter code and one letter code
K, Lys
13
Methionine Three letter code and one letter code
Met, M
14
Phenylalanine Three letter code and one letter code
Phe, F
15
Proline Three letter code and one letter code
Pro, P
16
Serine Three letter code and one letter code
Ser, S
17
Threonine
Thr, T
18
Tryptophan Three letter code and one letter code
Trp, W
19
Tyrosine Three letter code and one letter code
Tyr, Y
20
Valine Three letter code and one letter code
Val, V
21
The only amino acid with sulfhydryl group
Cysteine
22
Who showed that the enzyme urease was a protein
James b sumner.
23
WHat is the monomer unit of Protein
Amino acid.
24
How many % nitrogen content of protein by mass.
15.4%
25
most abundant biomolecule in human
Protein
26
most abundant biomolecule in environment
Carbohydrates.
27
An organic compound that contains both an amino (- NH2) and carboxyl (-COOH)
Amino acid.
28
NH2 and COOH group is attached
Alpha carbon
29
vary in size, shape, charge, acidity, functional groups present, hydrogen-bonding ability, and chemical reactivity.
R= Side chain
30
How many standard amino acids are non polar
8
31
have 2 COOH (present in general formula and R side chain
Polar acidic.
32
have NH2
Polar basic.
33
How many amino acids belong to Polar neutral
7.
34
How many amino acids belong to Polar acidic
2.
35
How many amino acids belong to Polar basic
2.
36
smallest amino acid and only achiral amino acid (no isomerism)
Glycerin.
37
What functional group are present in polar neutral amino acid
OH, COOH, NH2, SH
38
Argenine found only in?
Children.
39
How many amino acids are needed for adults
9.
40
How many amino acids are needed for Children
10
41
What are the essential amino acids
Phenylalanine, Valine, Threonine, Tryptophan , isoleucine , Leucine, Methionine , Histidine , Arganine, Lysine
42
What are the exclusively ketogenic
Lysine, Leucine
43
What are the both ketogenic and glucagenic
Isoleucine , Theonine, Trptophan, Tyrosine , Phenylalanine.
44
Are two or more incomplete dietary proteins that, when combined, provide an adequate amount of all essential amino acids relative to the body’s needs
Complementary dietary protein.
45
— NH2 on the left
L- isomer
46
— NH2 on the Right
D-Isomers
47
An ion with + (positive) and – (Negative) charges on the same molecule with a net zero charge.
Zwitterion
48
give-up a proton to get negative charge
Carbox group.
49
accept a proton to become positive.
Amino groups.
50
pH at which the concentration of Zwitterion is maximum -- net charge is zero
Isoelectric point.
51
Different amino acids have different isoelectric points
True
52
amino acids are not attracted towards an applied electric field because they net zero charge.
Isoelectric point.
53
In commuting isoelectronic in acidic → get the 2 LOWEST; basic → get the 2 HIGHEST.
True.
54
only standard amino acid with a sulfhydryl group ( — SH group)
Cysteine.
55
two cysteine residues linked via a covalent disulfide bond.
Cystine
56
What is the 21st amino acid
Seleni cysteine.
57
Aliphatic AA
Leucine, Isoleucine, Valine, Alanine, Glycine.
58
The only achiral (side chain - H
Glycine.
59
R group - metyl
Alanine.
60
can be classified as branched chain amino acid
Valine, Leucine , Isoleucine
61
R group - isopropyl
Valine
62
R group - isobutyl
leucine
63
R group - sec butyl
Isoleucine.
64
- R group - Guanidino (test used: saka guchi test)
Arginine
65
R group - Imidazole (test used: pauly diazo test)
Histidine.
66
test use: Fohl’s test
Methionine.
67
(lead acetate = + black precipitate)
Fohl's test
68
R group: methyl + benzene
Phenylalanine
69
What is the test used in phenylalanine
Xanthoproteic test
70
What is the Reagent in phenylalanine
Nitric acid.
71
R group: Phenol, only phenolic amino acid
Tyrosine.
72
What is the test for tryptophan
Hopkins cole test
73
What us the rtest for tyrosine
Million's test
74
R group: indole ring
Tryptophan
75
AKA: IMINO ACID → the only secondary amino acid
Proline.
76
detect the level of organization of amino acid)
Ninhydrin.
77
Ninhydrin the primary amino acid appears?
Blue.
78
Ninhydrin the secondary amino acid appears?
Yellow
79
unbranched chain of amino acids
Peptides.
80
The length of the amino acid chain can vary from a few amino acids to many amino acids.
Peptides.
81
bond between two amino acids
Dipeptide.
82
bond between ~ 10 - 20 amino acids
Oligopeptide.
83
bond between large number of amino acids
Polypeptide.
84
Every peptide has an N-terminal end and a C-terminal end.
True.
85
peptide bonds
Amino acid.
86
glycosidic bond
Carbohydrates
87
ester linkages
Lipid
88
phosphodiester, n-glycosidic
Nucleic acid.
89
where amino group located
N terminal
90
nasa dulo si COOH (right)
C terminal
91
The repeating sequence of peptides bind and a-carbon -CH group in a peptide js referred as
Backbone
92
Kung sino yung nasa c terminal end → hindi na siya mag-e-end sa -YL (we will get the full name of c terminal) = SERINE
True.
93
if hindi C terminal, they should end in -YL = ALANYL AND PHENYLALANYL (except in tryptophan → If nasa harap/gitna = tryptophanYL)
True.
94
Same amino acid but different order
Isomeric peptides.
95
Isomeric Peptide higher the possibility of its isomers if tumataas ang number of chain
Isomeric peptide.
96
MORE ISOMERS = MORE CHAIN
True.
97
What are biochemically active peptides
Hormone, Neurotransmitter , Antioxidant.
98
love hormone
Oxytocin.
99
antidiuretic hormone (ADH)
Vasopressin.
100
are pentapeptide neurotransmitters produced by the brain and bind receptor within the brain
Enkephalins.