NITROGEN METABOLISM ASSIGNMENT

1	The pair in one of the sets show reversal processes Biological Nitrogen fixation – Nitrogen assimilation Denitrification - Nitrification Ammonification – Nitrogen assimilation Ammonification - Denitrification Ans:Ammonification – Nitrogen assimilation
2	Process in which Ammonia is formed are I. Industrial Physical Nitrogen fixation II. Ammonification III. Biological nitrogen fixation IV. Volcanic eruptions All except IV All except I II and III All Ans:All
3	Microbes involved in mineralization process of Nitrogen cycle are Algae and Bacteria Algae and Fungi Fungi and Bacteria Bacteria and Viruses Ans:Fungi and Bacteria
4	Study the following table and choose the correct combination I and III II and IV III and IV I and II Ans:I and III
5	Study the following and choose the correct match A - II, B - V, C - IV, D - I A - III, B - V, C - IV, D - II A - II, B - IV, C - V, D - I A - III, B - V, C - IV, D - I Ans:A - III, B - V, C - IV, D - I
6	Study the following table and choose the correct combination I, III II, IV III, IV I, II Ans:II, IV
7	[A]: AUG is the first codon present at the beginning of mRNA molecule of all organisms. [R]: Chain initiating codon is present at the 5' end of coding region of mRNA. Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans: A is false but R is true
8	Choose the correct statement In an organism, all types of its proteins are formed throughout its life span All types of proteins consists of 20 types of amino acids The sequence of amino acids present in two different types of proteins is not same A given protein has a maximum of 500 amino acids. Ans:The sequence of amino acids present in two different types of proteins is not same
9	Minimum number of codons that indicate the 20 amino acids is 62 61 64 20 Ans:20
10	The following set of codons do not indicate the amino acid serine. I. UCA – UCC II. UCG – UCU III. AGU – AGA IV. AGC – AGG I and II II and III III and IV I and III Ans:III and IV
11	The following codon can code for 2 different amino acids at different places. GUC UGG GUG GGU Ans:GUG
12	This is not a feature of Genetic code It shows degeneracy with respect to all amino acids It is non-overlapping It is usually non-ambiguous It is Triplet code Ans:It shows degeneracy with respect to all amino acids
13	If the coding region of a mRNA has the codons AUG, AGU, UUU, GGG, UCA, UAA, the amino acids present in resultant polypeptide chain are Methionine, Serine, Phenyl Alanine, Glycine, Serine, Serine Methionine, Serine, Tryptophan, Glycine, Serine Mehionine, Glycine, Phenyl Alanine, Glycine, Serine Methionine, Serine, Phenyl Alanine, Glycine, Serine Ans:Methionine, Serine, Phenyl Alanine, Glycine, Serine
14	Identify the legitimate sequence of codons in the coding region of mRNA. AUG, GGA, UGA, ACU UGG, GGG, UUU, UAA AUG, UUU, GGG, UAA UCC, CCU, AAU, UAA Ans:AUG, UUU, GGG, UAA
15	The following codon does not indicate any amino acid. UAG AGU GAU UAC Ans:UAG
16	This is metabolically unstable molecule Code copy Code complement Protein mRNA Ans:mRNA
17	The nucleotide ‘G’ present on anti-sense strand is transcribed as A U C T Ans:C
18	Pre messenger RNA is called as hn RNA sn RNA gn RNA rn RNA Ans:hn RNA
19	[A]: Transcription is initiated at promoter region [R]: In a mRNA, the nitrogen bases at the 5' end are complementary to nitrogen bases present at 5' end of template strand of DNA. Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:A is true but R is false
20	Transcription is DNA dependent DNA synthesis RNA dependent DNA synthesis RNA dependent protein synthesis DNA dependent RNA synthesis Ans:DNA dependent RNA synthesis
21	[A]: Genetic code is non-ambiguous [R]: GUG always codes for amino acid valine Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:A is true but R is false
22	The factor that is responsible for movement of Ribosome on mRNA during translation is EFT RF EFG IF Ans:EFG
23	The number of ATP used for the transfer of 2 electrons from Ferridoxin to N2 during biological nitrogen fixation is 2 12 4 6 Ans:4
24	[A]: Bossingault was first to notice increase in soil fertility by leguminous crops [R]: He discovered the presence of Rhizobia in the root nodules of Legumes. Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:A is false but R is true
25	The following can fix N2 into NH3 either symbiotically or non-symbiotically. I. Frankia II. Nostoc III. Rhizobium IV. Anabaena II and IV I and II III and IV I and IV Ans:II and IV
26	This is not Diazotroph Rhizobium in the soil Clostridium in the soil Azotobacter in the soil Rhizobium in the root cells Ans:Rhizobium in the soil
27	In Azotobacter, the source of electrons for Nitrogen fixation is Glycolytic Pyruvic acid and ATP is of aerobic respiration, how many molecules of Glucose must be oxidized for the formation of 10 NH3. 12 8 7 10 Ans:10
28	This more efficient in fixing atmospheric Nitrogen Rhodospirillum Azotobacter Glomus Rhizobium of root nodule Ans:Rhizobium of root nodule
29	The following is byproduct during biological nitrogen fixation NADH2 NADPH2 H2 NH3 Ans:H2
30	Heterocysts are present in Legume Nostoc Frankia Rhizobium Ans:Nostoc
31	Match the following with respect to Nitrogen fixation A - IV, B -V, C -III, D -II A - V, B -III, C -II, D -I A - IV, B -III, C -II, D -I A - IV, B -II, C -I, D -III Ans:A - IV, B -III, C -II, D -I
32	Study the following table and choose the correct combination I and III II and IV II and III I and II Ans:I and II
33	[A]: Nitrogenase is Hexameric enzyme. [R]: It has 6 types of active sites. Both A and R are true and R is the correct explanation of A Both A and R are true but R is not the correct explanation of A A is true but R is false A is false but R is true Ans:A is true but R is false
34	Arrange the involvement of the following during Nodulation in Legumes I. Lectins II. Cellulase III. Flavanoids IV. Curling factor I, III, II, IV III, I, II, IV III, I, IV, II III, IV, I, II Ans:III, I, IV, II
35	Alnus is inhabited by Anabaena Nostoc Frankia Rhizobium Ans:Frankia
36	Arrange the following in correct sequence during nodulation in Legumes. I. Bacteroid formation II. Shepherds crook III. Infection thread formation IV. Arrest of root hair growth II, IV, III, I II, III, IV, I II, IV, I, III II, I, IV, III Ans:II, IV, III, I
37	These group of plants can be symbiotic in Fungi, Bryophytes, Pteridophytes, Gymnosperms and Angiosperms Bacteria Green Algae Blue green algae Bacteroids Ans:Blue green algae
38	Nitrogenase has the micronutients Fe, Mn Fe, Mo Ca, Fe Mn, Mo Ans:Fe, Mo
39	Host structure involved in bringing the Rhizobia upto inner cortical cell Endoplasmic reticulum Golgi complex Plasma membrane microtubules Ans:Plasma membrane
40	The isotope used to understand the mechanism of diazotrophy is N15 C14 O18 S35 Ans:N15