UGC NET Exam > UGC NET Questions > Consider the following statements for deoxy-h...
Start Learning for Free
Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:
A. they are involved in O2 transport in biological systems
B. they contain two metal ions in their active site
C. active site metal centres are bridged by amino acid residues
D. they prefer to bind only one O2 per active site
The correct statements are
A. they are involved in O2 transport in biological systems
B. they contain two metal ions in their active site
C. active site metal centres are bridged by amino acid residues
D. they prefer to bind only one O2 per active site
The correct statements are
- a)A, B and D
- b)A, C and D
- c)B, C and D
- d)A and C
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Consider the following statements for deoxy-hemerythrin and deoxy-hemo...
- The metalloprotein hemerythrin involves Fe in the +2 oxidation state. The uptake of O2 by hemerythrin involves the two-electron oxidation of the diferrous center to produce a hydroperoxide (OOH−) complex.
- The conformation of the hemerythrin subunit designated the hemerythrin fold, has four nearly parallel α-helical segments surrounding the pair of non-heme iron atoms, the oxygen binding site.
- These iron atoms are linked to the protein through specific histidine and tyrosine side chains.
- The active site structure for oxy-hemerythrin is:
- Hemocyanin is a copper-containing protein that is found in the blood of some mollusks and arthropods. It is involved in oxygen transport, much like hemoglobin in vertebrates. Hemocyanin has a complex structure consisting of subunits, and each subunit contains a copper ion.
- The copper ions in hemocyanin form a dinuclear copper center, where the two copper ions are surrounded by histidine residues.
- This copper center is responsible for the binding of oxygen molecules. When oxygen binds to hemocyanin, the copper ions are reduced from the cupric (Cu(II)) state to the cuprous (Cu(I)) state. This reduction is facilitated by the histidine residues that bridge the two copper ions.
- The oxygen molecules are bound to the copper ions in a reversible manner, which means that oxygen can be released when needed. When oxygen is released, the copper ions are oxidized back to the cupric state.
- Thus, both deoxyhemerythrin and deoxy hemocyanin are O2 transport protein in biological system.
- Both contain two metal ion at active site and they bind only O2 per active site.
Hence, The correct statements are A, B and D.
Most Upvoted Answer
Consider the following statements for deoxy-hemerythrin and deoxy-hemo...
Deoxy-hemerythrin and deoxy-hemocyanin
Statement Analysis:
Let's analyze each statement to determine its correctness.
Statement A: they are involved in O2 transport in biological systems
- This statement is correct. Both deoxy-hemerythrin and deoxy-hemocyanin are involved in the transport of oxygen in biological systems.
Statement B: they contain two metal ions in their active site
- This statement is incorrect. Deoxy-hemerythrin contains two iron ions in its active site, while deoxy-hemocyanin contains two copper ions in its active site. Therefore, this statement is only true for deoxy-hemerythrin, not for deoxy-hemocyanin.
Statement C: active site metal centers are bridged by amino acid residues
- This statement is correct. Both deoxy-hemerythrin and deoxy-hemocyanin have metal centers in their active sites that are bridged by amino acid residues. In deoxy-hemerythrin, the iron ions are bridged by histidine residues, while in deoxy-hemocyanin, the copper ions are bridged by histidine residues.
Statement D: they prefer to bind only one O2 per active site
- This statement is incorrect. Deoxy-hemerythrin can bind two oxygen molecules per active site, while deoxy-hemocyanin can bind only one oxygen molecule per active site. Therefore, this statement is only true for deoxy-hemocyanin, not for deoxy-hemerythrin.
Correct Statements:
Based on the analysis above, the correct statements are:
- A. they are involved in O2 transport in biological systems
- B. they contain two metal ions in their active site (only true for deoxy-hemerythrin)
- D. they prefer to bind only one O2 per active site (only true for deoxy-hemocyanin)
Therefore, the correct answer is option 'A' (A, B, and D).
|
Explore Courses for UGC NET exam
|
|
Similar UGC NET Doubts
Top Courses for UGC NETView all
Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer?
Question Description
Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer? for UGC NET 2025 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for UGC NET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer?.
Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer? for UGC NET 2025 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for UGC NET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for UGC NET.
Download more important topics, notes, lectures and mock test series for UGC NET Exam by signing up for free.
Here you can find the meaning of Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following statements for deoxy-hemerythrin and deoxy-hemocyanin:A. they are involved in O2 transport in biological systemsB. they contain two metal ions in their active siteC. active site metal centres are bridged by amino acid residuesD. they prefer to bind only one O2 per active siteThe correct statements area)A, B and Db)A, C and Dc)B, C and Dd)A and CCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice UGC NET tests.
|
|
Explore Courses for UGC NET exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup