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