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প্রোটিন অণুর মধ্যে অ্যামাইনো এসিডের অণুসমূহ যে বন্ধন দ্বারা যুক্ত থাকে- (The bond present between amino acid units Glycosidic bondin protein molecule is–)
ক
Glycosidic bond
খ
Peptide bond
গ
Hydrogen bond
ঘ
Metallic bond
সঠিক উত্তর:
Hydrogen bond
প্রোটিন অণুর মধ্যে অ্যামাইনো এসিডের অণুসমূহ যে বন্ধন দ্বারা যুক্ত থাকে – (The bond present between amino acid units in protein molecule is -)
ক
Glycosidic bond
খ
Peptide bond
গ
Hydrogen bond
ঘ
Metallic bond
Consider the following statements regarding genetic code and choose the correct answer:
1. The genetic code is degenerate
2. In all amino acids the first two bases are the same in all the codons that represent a particular amino acid
3. The number of codons an amino acid can claim is proportional to the frequency of the amino acid in proteins
4. Amino acids with codons ending in U or A also have codons ending in C or G respectively
ক
Only 1, 2 and 3 are true
খ
Only 2, 3 and 4 are true
গ
Only 1, 3 and 4 are true
ঘ
Only 1 and 4 are true
In a batch process, the reaction takes place in the presence of an acid medium. The acid is drained from the reaction vessel at the rate of 15ml/s as a result of the density difference of the acid from the reacting component. To avoid wastage of acid, it is recycled to an acid tank which has 1000 L capacity. The acid drained from the reaction vessel, picks up 50 g/L solids from the reactor. Acid is fed once again to the process from acid tank. When the process is started, the acid is almost pure in the tank as a result of filtration. As the reaction proceeds, acid in the tank gets more and more contaminated with the solids. The concentration of the solids should not exceed 100 g/L from the process point of view. The batch time is 16h. Estimate whether the concentration of the solids will exceed 100g/L during the batch reaction.
ক
37.04 h
খ
30.05 h
গ
36.04 h
ঘ
32.05 h
Raw material purchased:
1
st
January, 600 units @ Rs. 12 per unit
12
th
January, 500 units @ Rs. 14 per unit
21
st
January, 300 units @ Rs. 13 per unit
Raw material issued for manufacture:
3
rd
January 300 units
5
th
January 124 units
15
th
January 250 units
16
th
January 300 units
Raw material returned to stores from manufacturing department on 14
th
January, 50 units. The material is issued on First-in-First out method.
The value of material remaining in store on 21
st
January will be:
ক
5,775
খ
6,100
গ
6,350
ঘ
6,600
Analysis of a hexapeptide using enzymatic cleavage reveals the following result:
• Amino acid composition of the peptide is: 2R, A, V, S, Y
• Trypsin digestion yields two fragments and the compositions are: (R, A, V) and (R, S, Y)
• Chymotrypsin digestion yields two fragments and the compositions are: (A, R, V, Y) and (R, S)
• Digestion with carboxypeptidase A yields no cleavage product.
Given: Trypsin cleaves at carboxyl side of R. Chymotrypsin cleaves at carboxyl side of Y. Carboxypeptidase A cleaves at amino side of the C-terminal amino acid (except R and K) of the peptide.
The correct amino acid sequence of the peptide is:
ক
RSYRVA
খ
AVRYSR
গ
SRYVAR
ঘ
SVRRYA
প্রোটিনের মধ্যে অ্যামাইনো এসিডসমূহ পরস্পর কি বন্ধন দ্বারা যুক্ত থাকে?
ক
গ্লাইকোসাইড বন্ড
খ
হাইড্রোজেন
গ
মেটলিক
ঘ
পেপটাইড
প্রোটিনের মধ্যে অ্যামাইনো এসিডসমূহ পরস্পর যে বন্ধন দ্বারা যুক্ত থাকে তা-
ক
Glycoside bond
খ
Hydrogen
গ
Peptide
ঘ
Metallic bond
A protein molecule contains amino acid residues and not amino acids because when a peptide bond is formed _________ is lost.
ক
nitrogen molecule
খ
hydrogen molecule
গ
oxygen molecule
ঘ
water molecule
First, the bond between the amino acid and the tRNA in the P site is cleaved, then the peptide bond is formed between the two amino acids.
ক
False
খ
True
PROTPARS counts the minimum number of mutations to change a codon for the first amino acid into a codon for the second amino acid, but only scores those mutations in the mutational path that actually change the amino acid.
ক
True
খ
False