1.The preferred conformation of cis-1,3-dimethylcyclohexane is:?

1.The preferred conformation of cis-1,3-dimethylcyclohexane is:?
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Which of the following has two equatorial alkyl substituents in its most stable conformation? (a) 1,1-dimethylcyclohexane (b) cis-1,2-dimethylcyclohexane (c) cis-1,3-diethylcyclohexane (d) cis-1,4-diethylcyclohexane

Description : Which of the following has two equatorial alkyl substituents in its most stable conformation? (a) 1,1-dimethylcyclohexane (b) cis-1,2-dimethylcyclohexane (c) cis-1,3-diethylcyclohexane (d) cis-1,4-diethylcyclohexane

Last Answer : cis-1,3-diethylcyclohexane

Newman projection of Butane is given, C-2 is rotated by `120^(º)` along `C_(2)-C_(3)` bond in anticloclwise direction, the conformation formed is :

Description : Newman projection of Butane is given, C-2 is rotated by `120^(º)` along `C_(2)-C_(3)` bond in anticloclwise direction, the conformation formed is :

Last Answer : Newman projection of Butane is given, C-2 is rotated by `120^(º)` along `C_(2)-C_(3)` ... A. anti B. fully eclipsed C. gauche D. partially eclipsed

In the following the most stable conformation of n-butane is :

Description : In the following the most stable conformation of n-butane is :

Last Answer : In the following the most stable conformation of n-butane is : A. B. C. D.

The least stable conformation of cyclohexane is

Description : The least stable conformation of cyclohexane is

Last Answer : The least stable conformation of cyclohexane is A. Boat B. Chair C. Twist boat D. Half chair

The true statement about the following conformation is :

Description : The true statement about the following conformation is :

Last Answer : The true statement about the following conformation is : A. It has maximum angle strain. B. It ... bonding. D. It has maximum Vander Waal strain.

The eclipsed and staggered conformation of ethane is due to -

Description : The eclipsed and staggered conformation of ethane is due to -

Last Answer : The eclipsed and staggered conformation of ethane is due to - A. Free rotation about C-C single bond ... rotation about C-C bond D. None of the above

‘Lock’ and ‘Key’ model of enzyme action proposed by Fisher implies that (A) The active site is flexible and adjusts to substrate (B) The active site requires removal of PO4 group (C) The active site is complementary in shape to that of the substrate (D) Substrates change conformation prior to active site interaction

Description : Lock' and Key' model of enzyme action proposed by Fisher implies that (A) The active site is flexible and adjusts to substrate (B) The active site requires removal of PO4 group ( ... complementary in shape to that of the substrate (D) Substrates change conformation prior to active site interaction

Last Answer : Answer : C

An allosteric enzyme influences the enzyme activity by (A) Competiting for the catalytic site with the substrate (B) Changing the specificity of the enzyme for the substrate (C) Changing the conformation of the enzyme by binding to a site other than catalytic site (D) Changing the nature of the products formed

Description : An allosteric enzyme influences the enzyme activity by (A) Competiting for the catalytic site with the substrate (B) Changing the specificity of the enzyme for the substrate (C) Changing the conformation ... binding to a site other than catalytic site (D) Changing the nature of the products formed

Last Answer : Answer : C

Fischer’s ‘lock and key’ model of the enzyme action implies that (A) The active site is complementary in shape to that of substance only after interaction. (B) The active site is complementary in shape to that of substance (C) Substrates change conformation prior to active site interaction (D) The active site is flexible and adjusts to substrate

Description : Fischer's lock and key' model of the enzyme action implies that (A) The active site is complementary in shape to that of substance only after interaction. (B) The active site is ... change conformation prior to active site interaction (D) The active site is flexible and adjusts to substrate

Last Answer : Answer : B

Both α-helix and β-pleated sheet conformation of proteins were proposed by (A) Watson and Crick (B) Pauling and Corey (C) Waugh and King (D) Y.S.Rao

Description : Both α-helix and β-pleated sheet conformation of proteins were proposed by (A) Watson and Crick (B) Pauling and Corey (C) Waugh and King (D) Y.S.Rao

Last Answer : Answer : B

The most stable conformation of cyclohexane is the : (a) Haworth form (b) Boat form (c) Newman form (d) Chair form

Description : The most stable conformation of cyclohexane is the : (a) Haworth form (b) Boat form (c) Newman form (d) Chair form

Last Answer : Chair form

The α-Helix is held in a coiled conformation partially because of : (a) Optical activity (b) Hydrogen bonding (c) Resonance (d) Delocalization

Description : The α-Helix is held in a coiled conformation partially because of : (a) Optical activity (b) Hydrogen bonding (c) Resonance (d) Delocalization

Last Answer : Hydrogen bonding

Which of the following is the “quaternary structure” of proteins concerned with? (a) sequence of amino acids in the peptide chain (b) description of the way the peptide chains are arranged with respect to each other (c) location of the disulfide bridges in the peptide chain (d) conformation of the protein backbone

Description : Which of the following is the quaternary structure of proteins concerned with? (a) sequence of amino acids in the peptide chain (b) description of the way the peptide chains are arranged with ... (c) location of the disulfide bridges in the peptide chain (d) conformation of the protein backbone

Last Answer : description of the way the peptide chains are arranged with respect to each other

Which of the following may characterize the “secondary structure” of proteins? (a) conformation of the protein backbone (b) α-Helix (c) parallel β-pleated sheet (d) all of the above

Description : Which of the following may characterize the “secondary structure” of proteins? (a) conformation of the protein backbone (b) α-Helix (c) parallel β-pleated sheet (d) all of the above

Last Answer : all of the above

The eclipsed and staggered forms of ethane are said to differ in __________. (a) molecular formula (b) configuration (c) conformation (d) constitution

Description : The eclipsed and staggered forms of ethane are said to differ in __________. (a) molecular formula (b) configuration (c) conformation (d) constitution

Last Answer : conformation

The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning (A) 1 : 1 : 2 (B) 1 : 2 : 4 (C) 1 : 3 : 6 (D) 1 : 4 : 10

Description : The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning (A) 1 : 1 : 2 (B) 1 : 2 : 4 (C) 1 : 3 : 6 (D) 1 : 4 : 10

Last Answer : Answer: Option D

Wool breed are judged 60% for their wool, and what percent for their conformation?

Description : Wool breed are judged 60% for their wool, and what percent for their conformation?

Last Answer : 40%

Which of the following is not phase of qualitative research? a. Orientation and overview b. Focused exploration c. Conformation and Closure d. Orientation and closure

Description : Which of the following is not phase of qualitative research? a. Orientation and overview b. Focused exploration c. Conformation and Closure d. Orientation and closure

Last Answer : a. Orientation and overview

The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind acetylcholine B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules C. Phosphorylation results in rapid degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Description : The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind ... degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Last Answer : B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules

The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind acetylcholine B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules C. Phosphorylation results in rapid degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Description : The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind ... degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Last Answer : B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules

What are the advantages/disadvantages of being diagnosed with Clinical Isolated Syndrome (CIS) versus Multiple Sclerosis (MS)?

Description : What are the advantages/disadvantages of being diagnosed with Clinical Isolated Syndrome (CIS) versus Multiple Sclerosis (MS)?

Last Answer : My knowledge is very limited on this, and I am not a medical professional. I think it means your doctor is hoping you will not go on to develop MS, but had a single neurological episode of some sort. Did ... this is also considered a good sign, and may be why the doctor has called it CIS and not MS.

What is the full form of CIS ?

Last Answer : The full form of CIS Commonwealth of Independent States

How many of the following are cis dichlorocyclohexane.

Description : How many of the following are cis dichlorocyclohexane.

Last Answer : How many of the following are cis dichlorocyclohexane.

The most stable form of cis cyclohexane -1,3-diol is represented as :1

Description : The most stable form of cis cyclohexane -1,3-diol is represented as :1

Last Answer : The most stable form of cis cyclohexane -1,3-diol is represented as :1 A. B. C. D.

Which can show the cis-trans isomerism:

Description : Which can show the cis-trans isomerism:

Last Answer : Which can show the cis-trans isomerism: A. `CICH_(2)CH_(2)CI` B. `CI_(2)C=C=CH_(2)` C. `CH_(2)C=CCI_(2)` D. CICH=C=CHCI

Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. (i) 1e, 2e (ii) 1e, 3e (iii) 1e,

Description : Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. (i) 1e, 2e (ii) 1e, 3e (iii) 1e,

Last Answer : Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. ... 3a (vi) 1e, 4a (vii) 1a, 3a

In which compound, Cis-Trans nomenclature cannot be used?

Description : In which compound, Cis-Trans nomenclature cannot be used?

Last Answer : In which compound, Cis-Trans nomenclature cannot be used? A. `CH_(3)-CH=CH-CH_(3)` B. `CH_(3)-CH=CH-COOH` C. D. `C_(6)H_(5)-CH=CH-CHO`

Cis-trans isomerism is found in square planar complexes of molecular formula: (a and b are monodentate ligands)

Description : Cis-trans isomerism is found in square planar complexes of molecular formula: (a and b are monodentate ligands)

Last Answer : Cis-trans isomerism is found in square planar complexes of molecular formula: (a and b are monodentate ligands) A. ` ... . `Ma_(2)b_(2)` D. `Mab_(3)`

Which of the following complexes can exists as enantiomers ? Draw their structures `(a) cis-[Co(NH_(3))_(4)Br_(2)]^(+) " " (b) cis-[Cr(H_(2)O)_(2)(en)

Description : Which of the following complexes can exists as enantiomers ? Draw their structures `(a) cis-[Co(NH_(3))_(4)Br_(2)]^(+) " " (b) cis-[Cr(H_(2)O)_(2)(en)

Last Answer : Which of the following complexes can exists as enantiomers ? Draw their structures `(a) cis-[Co(NH_(3))_(4)Br_(2)]^ ... [Co(NH_(3))_(2)(en)_(2)]^(2+)`

Why cis isomers are polar and trans are not?

Description : Why cis isomers are polar and trans are not?

Last Answer : Need answer

Benefits of Cis insurance?

Description : Benefits of Cis insurance?

Last Answer : CIS insurance does offer good rates for its customers, but if you are unsure about the company or are thinking of switching, you may want to look into progressive.com as an alternative ... various coverage, provide great customer service, and allow flexibility in the insurance plans that you choose.

Best available cis insurance, worthwhile.?

Description : Best available cis insurance, worthwhile.?

Last Answer : CIS is Co-operative insurance available in the UK, it provides auto, home, pet, life, commercial and business insurance. CIS also provides banking and investment services. Their website is very easy to navigate.

what is indicated by the prefixes cis- and trans-?

Description : what is indicated by the prefixes cis- and trans-?

Last Answer : The type of stereoisomer

cis-acting elements include (A) Steroid hormones (B) Calcitriol (C) Histones (D) Silencers

Description : cis-acting elements include (A) Steroid hormones (B) Calcitriol (C) Histones (D) Silencers

Last Answer : Answer : D

Inducers and repressors are (A) Enhancer and silencer elements respectively (B) Trans-acting factors (C) Cis-acting elements (D) Regulatory proteins

Description : Inducers and repressors are (A) Enhancer and silencer elements respectively (B) Trans-acting factors (C) Cis-acting elements (D) Regulatory proteins

Last Answer : Answer : B

Besides structural genes that encode proteins, DNA contains some regulatory sequences which are known as (A) Operons (B) Cistrons (C) Cis-acting elements (D) Trans-acting factors

Description : Besides structural genes that encode proteins, DNA contains some regulatory sequences which are known as (A) Operons (B) Cistrons (C) Cis-acting elements (D) Trans-acting factors

Last Answer : Answer : C

In the biosynthesis of cholesterol, the rate limiting enzyme is (A) Mevalonate kinase (B) HMG-CoA synthetase (C) HMG-CoA reductase (D) Cis-prenyl transferase

Description : In the biosynthesis of cholesterol, the rate limiting enzyme is (A) Mevalonate kinase (B) HMG-CoA synthetase (C) HMG-CoA reductase (D) Cis-prenyl transferase

Last Answer : Answer : C

Fluoroacetate inhibits the reaction of citric acid cycle: (A) Isocitrate α-Ketoglutarate (B) Fumarate α-Malate (C) Citrate α-cis-aconitate (D) Succinate α-fumarate

Description : Fluoroacetate inhibits the reaction of citric acid cycle: (A) Isocitrate α-Ketoglutarate (B) Fumarate α-Malate (C) Citrate α-cis-aconitate (D) Succinate α-fumarate

Last Answer : Answer : C

Prosthetic group in cone cell phototreceptors is (A) Iodine (B) Opsin (C) 11-cis-retinal (D) all-trans-retinal

Description : Prosthetic group in cone cell phototreceptors is (A) Iodine (B) Opsin (C) 11-cis-retinal (D) all-trans-retinal

Last Answer : Answer : C

When light falls on rod cells (A) All-cis-retinal is converted into all-trans-retinal (B) 11-cis-retinal is converted into 11-trans-retinal (C) 11-trans-retinal is converted into all-transretinal (D) 11-cis-retinal is converted into all-trans-retinal

Description : When light falls on rod cells (A) All-cis-retinal is converted into all-trans-retinal (B) 11-cis-retinal is converted into 11-trans-retinal (C) 11-trans-retinal is converted into all-transretinal (D) 11-cis-retinal is converted into all-trans-retinal

Last Answer : Answer : D

Rhodopsin contains opsin and (A) 11-cis-retinal (B) 11-trans-retinal (C) All-cis-retinal (D) All trans-retinal

Description : Rhodopsin contains opsin and (A) 11-cis-retinal (B) 11-trans-retinal (C) All-cis-retinal (D) All trans-retinal

Last Answer : Answer : A

On exposure to light rhodopsin forms (A) All trans-retinal (B) Cis-retinal (C) Retinol (D) Retinoic acid

Description : On exposure to light rhodopsin forms (A) All trans-retinal (B) Cis-retinal (C) Retinol (D) Retinoic acid

Last Answer : Answer : A

Which of the following statement about the peptide bond is true? (A) It is a carbon-carbon bond (B) It has cis hydrogen and oxygen groups (C) It is planar (D) It has rotational freedom

Description : Which of the following statement about the peptide bond is true? (A) It is a carbon-carbon bond (B) It has cis hydrogen and oxygen groups (C) It is planar (D) It has rotational freedom

Last Answer : Answer : B

Folding of newly synthesized proteins is accelerated by (A) Protein disulphide isomerase (B) Prolyl cis-trans isomerase (C) Chaperonins (D) All of these

Description : Folding of newly synthesized proteins is accelerated by (A) Protein disulphide isomerase (B) Prolyl cis-trans isomerase (C) Chaperonins (D) All of these

Last Answer : Answer : D

Which of the following interfere with normal collagen formation or cross-linking? A. Beta-aminopropionitrile. B. Iron chelators. C. Vitamin C depletion. D. Proline analogs (e.g., cis-hydroxyproline). E. D-Penicillamine.

Description : Which of the following interfere with normal collagen formation or cross-linking? A. Beta-aminopropionitrile. B. Iron chelators. C. Vitamin C depletion. D. Proline analogs (e.g., cis-hydroxyproline). E. D-Penicillamine.

Last Answer : Answer: ABCDE DISCUSSION: Intramolecular and intermolecular cross-links are crucial for collagen structural stability. Formation of cross-links can be inhibited by two ... concentration, proline analogs prevent collagen formation with minimal effects on noncollagenase protein synthesis

Among Cis and Trans structure of Hex-2-ene which has higher boiling point and why?

Description : Among Cis and Trans structure of Hex-2-ene which has higher boiling point and why?

Last Answer : Ans: The dipole moment of a molecule depends upon dipole-dipole interactions. Since cis-isomer has higher dipole moment, therefore it has higher boiling point.

The retinal pigment epithelium (RPE): a. is sensitive to hypervitaminosis A b. isomerizes all-trans-retinal to 11-cis-retinol c. does not undergo mitosis in response to injury d. secrets the outer layer of the basal lamina that forms the Bruch's membrane.

Description : The retinal pigment epithelium (RPE): a. is sensitive to hypervitaminosis A b. isomerizes all-trans-retinal to 11-cis-retinol c. does not undergo mitosis in response to injury d. secrets the outer layer of the basal lamina that forms the Bruch's membrane.

Last Answer : isomerizes all-trans-retinal to 11-cis-retinol

During phototransduction: a. hyperpolarisation occurs due to closure of the sodium channels b. 11-cis-retinal molecules are converted to all-trans-retinal c. transducin, a G protein converts GDP to GTP d. all above

Description : During phototransduction: a. hyperpolarisation occurs due to closure of the sodium channels b. 11-cis-retinal molecules are converted to all-trans-retinal c. transducin, a G protein converts GDP to GTP d. all above

Last Answer : all above

Highest milk producing country in the world is (a) USA (b) CIS (c) Switzerland (d) India

Description : Highest milk producing country in the world is (a) USA (b) CIS (c) Switzerland (d) India

Last Answer : (d) India

Two dominant nonallelic genes are 50 map units apart. The linkage is (a) cis type (b) trans type (c) complete (d) absent/incomplete.

Description : Two dominant nonallelic genes are 50 map units apart. The linkage is (a) cis type (b) trans type (c) complete (d) absent/incomplete.

Last Answer : (d) absent/incomplete.