The number of polypeptide chains present in a molecule of haemoglobin is/are

The number of polypeptide chains present in a molecule of haemoglobin is/are
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The number of polypeptide chains present in a molecule of haemoglobin is/are A. 1 B. 3 C. 4 D. 2
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Assertion `:` Most of the human haemoglobin in our body has `2 alph` and `2 beta` polypeptide chains. Reason `:` Haemoglobin is a conjugate protein an

Description : Assertion `:` Most of the human haemoglobin in our body has `2 alph` and `2 beta` polypeptide chains. Reason `:` Haemoglobin is a conjugate protein an

Last Answer : Assertion `:` Most of the human haemoglobin in our body has `2 alph` and `2 beta` polypeptide ... False. D. If both Assertion & Reason are false.

Insulin is oxidized to separate the protein molecule into its constituent polypeptide chains without affecting the other part of the molecule by the use of (A) Performic acid (B) Oxalic acid (C) Citric acid (D) Malic acid

Description : Insulin is oxidized to separate the protein molecule into its constituent polypeptide chains without affecting the other part of the molecule by the use of (A) Performic acid (B) Oxalic acid (C) Citric acid (D) Malic acid

Last Answer : Answer : A

Hemoglobin is a molecule made of four polypeptide chains, each bound to a iron-containing molecular group called a heme group. So the molecule contains four polypeptide chains and four heme groups. As a protein composed of association of polypeptide chains, the functionality of hemoglobin depends upon the integrity of its quaternary structure. Blood Questions - Image Diversity: hemoglobin molecule

Description : Hemoglobin is a molecule made of four polypeptide chains, each bound to a iron-containing molecular group called a heme group. So the molecule contains four polypeptide chains and four ... depends upon the integrity of its quaternary structure. Blood Questions - Image Diversity: hemoglobin molecule

Last Answer : On average what is the life duration of the red blood cells?

Each antibody molecule is made up of how many PAIR of polypeptide chains, joined together by disulfide bonds. a) 1 b) 2 c) 3 d) 4

Description : Each antibody molecule is made up of how many PAIR of polypeptide chains, joined together by disulfide bonds. a) 1 b) 2 c) 3 d) 4

Last Answer : ANSWER: B -- 2

Which of the following statements concerning abnormalities of the haemoglobin molecule is true? 1) Alpha thalassaemia is due to a deficiency of beta-chain production 2) HbS is caused by a single base mutation on the beta-chain 3) genes for the alpha and beta chains are located on the same chromosome 4) in thalassaemia persistance of HbF is an adverse prognostic sign 5) oliguneoclitide probes may assist in the diagnosis of haemoglobinopathies

Description : Which of the following statements concerning abnormalities of the haemoglobin molecule is true? 1) Alpha thalassaemia is due to a deficiency of beta-chain production 2) HbS is caused by a ... is an adverse prognostic sign 5) oliguneoclitide probes may assist in the diagnosis of haemoglobinopathies

Last Answer : Answers-2 Alpha Thalassaemia is due to abnormalities of the alpha chain. Persistence of HbF has survival advnatages in severely affected subjects. C-alpha 16, beta 11. e-Hb electrophoresis(Dr Shu Ho)

The minimum number of polypeptide chains in an immunoglobulin is (A) Two (B) Four (C) Five (D) Six

Description : The minimum number of polypeptide chains in an immunoglobulin is (A) Two (B) Four (C) Five (D) Six

Last Answer : Answer : B

Nonsense codons bring about (A) Amino acid activation (B) Initiation of protein synthesis (C) Termination of protein synthesis (D) Elongation of polypeptide chains

Description : Nonsense codons bring about (A) Amino acid activation (B) Initiation of protein synthesis (C) Termination of protein synthesis (D) Elongation of polypeptide chains

Last Answer : Answer : C

Human growth hormone has (A) One polypeptide chain and one intra-chain disulphide bond (B) One polypeptide chain and two intra-chain disulphide bond (C) Two polypeptide chains joined by one disulphide bond (D) Two polypeptide chains joined by two disulphide bond

Description : Human growth hormone has (A) One polypeptide chain and one intra-chain disulphide bond (B) One polypeptide chain and two intra-chain disulphide bond (C) Two polypeptide chains joined by one disulphide bond (D) Two polypeptide chains joined by two disulphide bond

Last Answer : Answer : B

When egg albumin is heated till it is coagulated, the secondary and tertiary structures of the proteins are completely lost resulting in a mixture of randomly arranged (A) Dipeptide chains (B) Tripeptide chains (C) Polypeptide chains(D) All of these

Description : When egg albumin is heated till it is coagulated, the secondary and tertiary structures of the proteins are completely lost resulting in a mixture of randomly arranged (A) Dipeptide chains (B) Tripeptide chains (C) Polypeptide chains(D) All of these

Last Answer : Answer : C

Isoenzymes for a given reaction (A) Have different spedificities (B) Have identical affinities for the same substrate (C) Exhibit different electrophoretic motilities (D) Contain similar ratios of different polypeptide chains

Description : Isoenzymes for a given reaction (A) Have different spedificities (B) Have identical affinities for the same substrate (C) Exhibit different electrophoretic motilities (D) Contain similar ratios of different polypeptide chains

Last Answer : Answer : B

The following are true about the sodium channels: a. they are made up of polypeptide chains b. have the highest densities at the nodes of Ranvier c. open in response to depolarization d. remain open as long as depolarization is maintained

Description : The following are true about the sodium channels: a. they are made up of polypeptide chains b. have the highest densities at the nodes of Ranvier c. open in response to depolarization d. remain open as long as depolarization is maintained

Last Answer : have the highest densities at the nodes of Ranvier

The primary structure of a protein refers to : (a) whether the protein is fibrous or globular (b) the amino acid sequence in the polypeptide chain (c) the orientation of the amino acid side chains in space (d) the presence or absence of an α-helix

Description : The primary structure of a protein refers to : (a) whether the protein is fibrous or globular (b) the amino acid sequence in the polypeptide chain (c) the orientation of the amino acid side chains in space (d) the presence or absence of an α-helix

Last Answer : the amino acid sequence in the polypeptide chain

When haemoglobin takes up oxygen there is a change in the structure due to the moving closer together of (A) β-chains (B) β-chains (C) γ-chains (D) α and γ chains

Description : When haemoglobin takes up oxygen there is a change in the structure due to the moving closer together of (A) β-chains (B) β-chains (C) γ-chains (D) α and γ chains

Last Answer : Answer : A

Foetal haemoglobin contains (A) Two α and two γ chains (B) Two β and two γ chains (C) Both (A) and (B) (D) None of these

Description : Foetal haemoglobin contains (A) Two α and two γ chains (B) Two β and two γ chains (C) Both (A) and (B) (D) None of these

Last Answer : Answer : A

Sickle cell anaemia induce to (a) change of amino acid in a-chain of haemoglobin (b) change of amino acid in b-chain of haemoglobin (c) change of amino acid in both a and b chains of haemoglobin (d) change of amino acid either a or b chains of haemoglobin.

Description : Sickle cell anaemia induce to (a) change of amino acid in a-chain of haemoglobin (b) change of amino acid in b-chain of haemoglobin (c) change of amino acid in both a and b chains of haemoglobin (d) change of amino acid either a or b chains of haemoglobin.

Last Answer : (b) change of amino acid in b-chain of haemoglobin

The portion of the immunoglobulin molecule that binds the specific antigen is formed by (A) Variable regions of H and L chains (B) Constant region of H chain (C) Constant region of L chain (D) Hinge region

Description : The portion of the immunoglobulin molecule that binds the specific antigen is formed by (A) Variable regions of H and L chains (B) Constant region of H chain (C) Constant region of L chain (D) Hinge region

Last Answer : Answer : A

An immunoglobulin molecule always contains (A) 1 κ and 3 λ type of chains (B) 2 κ and 2 λ type of chains (C) 3 κ and 1λ type of chains (D) 2 κ and 2 λ chains

Description : An immunoglobulin molecule always contains (A) 1 κ and 3 λ type of chains (B) 2 κ and 2 λ type of chains (C) 3 κ and 1λ type of chains (D) 2 κ and 2 λ chains

Last Answer : Answer : D

Each haemoglobin molecule contains (A) One iron atom (B) Two iron atoms (C) Four iron atoms (D) Six iron atoms

Description : Each haemoglobin molecule contains (A) One iron atom (B) Two iron atoms (C) Four iron atoms (D) Six iron atoms

Last Answer : Answer : C

A molecule in plants comparable to haemoglobin in animals is – (1) Cytochrome (2) Cellulose (3) Chlorophyll (4) Carotene

Description : A molecule in plants comparable to haemoglobin in animals is – (1) Cytochrome (2) Cellulose (3) Chlorophyll (4) Carotene

Last Answer : (3) Chlorophyll Explanation: Hemoglobin is the, ironcontaining oxygen-transport met alloprotein in the red blood cells of all vertebrates. Similarly, Cytochromes are, in general, membrane-bound ... helm, groups and are primarily responsible for the generation of ATP via electron transport.

A molecule in plants comparable to haemoglobin in animals is (1) Cytochrome (2) Cellulose (3) Chlorophyll (4) Carotene

Description : A molecule in plants comparable to haemoglobin in animals is (1) Cytochrome (2) Cellulose (3) Chlorophyll (4) Carotene

Last Answer : Chlorophyll

Cellulose is 1. a polypeptide 2. a polysaccharide 3. a polyester 4. present in plants 5. The correct statement(s) about cellulose is/are (a) 1 only (b) 2 and 4 only (c) 1 and 4 only (d) 3 and 4 only

Description : Cellulose is 1. a polypeptide 2. a polysaccharide 3. a polyester 4. present in plants 5. The correct statement(s) about cellulose is/are (a) 1 only (b) 2 and 4 only (c) 1 and 4 only (d) 3 and 4 only

Last Answer : Ans:(b)

Which of the following statements about nerve growth factor is not true a. it is made up of 3 polypeptide subunits b. it is found in high concentration in the submaxillary salivery gland c. it is picked up by nerves from the organs they innervate d. it is present in brain

Description : Which of the following statements about nerve growth factor is not true a. it is made up of 3 polypeptide subunits b. it is found in high concentration in the submaxillary salivery gland c. it is picked up by nerves from the organs they innervate d. it is present in brain

Last Answer : it is found in high concentration in the submaxillary salivery gland

Variable regions are present in (A) Immunoglobulins (B) α-Chains of T cell receptors (C) β-Chains of T cell receptors (D) All of these

Description : Variable regions are present in (A) Immunoglobulins (B) α-Chains of T cell receptors (C) β-Chains of T cell receptors (D) All of these

Last Answer : Answer : D

Constant segment genes of heavy chains are present in a cluster in which the first gene on side is (A) Alpha (B) Gamma (C) Delta (D) None of these

Description : Constant segment genes of heavy chains are present in a cluster in which the first gene on side is (A) Alpha (B) Gamma (C) Delta (D) None of these

Last Answer : Answer : D

Gamma heavy chains are present in (A) IgA (B) IgG (C) IgM (D) IgD

Description : Gamma heavy chains are present in (A) IgA (B) IgG (C) IgM (D) IgD

Last Answer : Answer : B

In which state iron is present in haemoglobin.

Description : In which state iron is present in haemoglobin.

Last Answer : In which state iron is present in haemoglobin. A. Unironic B. `Fe^(2+)` C. `Fe^(3+)` D. None of the above

Which of the following forms of haemoglobin is not present in erythrocytes ?

Description : Which of the following forms of haemoglobin is not present in erythrocytes ?

Last Answer : Which of the following forms of haemoglobin is not present in erythrocytes ? A. ... C. Carbon monooxyhaemoglobin D. Carbon dioxy haemoglobin

Element present in haemoglobin?

Description : Element present in haemoglobin?

Last Answer : Iron

Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as (a) bicarbonate in blood plasma and RBCs(b) free CO2 in blood plasma (c) 70% carbamino-haemoglobin and 30% as bicarbonate (d) carbamino-haemoglobin in RBCs.

Description : Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as (a) bicarbonate in blood plasma and RBCs (b) free CO2 in blood plasma (c) 70% carbamino-haemoglobin and 30% as bicarbonate (d) carbamino-haemoglobin in RBCs.

Last Answer : (a) bicarbonate in blood plasma and RBCs

On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because (A) Of clotting of blood(B) Of jamming of respiratory tract(C) It forms carboxyhemoglobin by combining with haemoglobin of blood,thereby making it incapable of absorbing oxygen(D) It forms CO2 by combining with oxygen present in the blood

Description : On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because (A) Of clotting of blood (B) Of jamming of respiratory tract (C) It forms carboxyhemoglobin by combining ... it incapable of absorbing oxygen (D) It forms CO2 by combining with oxygen present in the blood

Last Answer : (C) It forms carboxyhemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen

Magnesium is present in (A) Haemoglobin (B) Chlorophyll (C) Hypo solution (D) None of these

Description : Magnesium is present in (A) Haemoglobin (B) Chlorophyll (C) Hypo solution (D) None of these

Last Answer : (B) Chlorophyll

15. Identify the codon which is present in the sixth position of m-RNA of normal Haemoglobin gene A) GAG (b) GAA (c) GCC (d) GTG

Description : 15. Identify the codon which is present in the sixth position of m-RNA of normal Haemoglobin gene A) GAG (b) GAA (c) GCC (d) GTG

Last Answer : A) GAG

Role of CFC present in atmosphere is to a) Reduction in ozone b) Ozone formation c) Formation of leg haemoglobin a) Enhance chlorophyll formation.

Description : Role of CFC present in atmosphere is to a) Reduction in ozone b) Ozone formation c) Formation of leg haemoglobin a) Enhance chlorophyll formation.

Last Answer : a) Reduction in ozone

The number of amino acids in single chain polypeptide glucagons is (A) 21 (B) 29 (C) 31 (D) 39

Description : The number of amino acids in single chain polypeptide glucagons is (A) 21 (B) 29 (C) 31 (D) 39

Last Answer : Answer : B

What is the maximum number of different amino acids in a polypeptide chain coded by the synthetic polyribonucleotides (UCAG)5? A- One B- Two C- Three D- Four

Description : What is the maximum number of different amino acids in a polypeptide chain coded by the synthetic polyribonucleotides (UCAG)5? A- One B- Two C- Three D- Four

Last Answer : Three

calculation of amino acids from a polypeptide

Description : The gene for urcity polypeptide contains 450 nucleotide pairs. Calculate how many amino acids this polypeptide contains. It has to come out 150 I don't know how to calculate. Thank you very much for your help.

Last Answer : It should have something to do with the fact that each AMK is represented by a triplet (three proteins). so about only 450/3 = 150

A gene that takes part in synthesis of polypeptide is

Description : A gene that takes part in synthesis of polypeptide is

Last Answer : A gene that takes part in synthesis of polypeptide is A. Structural gene B. Regulator gene C. Operator gene D. Leading strand

Which of the following hormones does not contain a polypeptide ?

Description : Which of the following hormones does not contain a polypeptide ?

Last Answer : Which of the following hormones does not contain a polypeptide ? A. Insulin B. Oxytocin C. Prostaglandin D. Antidiuretic hormone

mRNA of prokaryotes can code for (A) More than one polypeptide (B) Only one polypeptide (C) Many exons and introns (D) Introns only

Description : mRNA of prokaryotes can code for (A) More than one polypeptide (B) Only one polypeptide (C) Many exons and introns (D) Introns only

Last Answer : Answer : A

A mRNA of eukaryotes can code for (A) Only one polypeptide (B) Two polypeptides (C) Three polypeptides (D) Five polypeptides

Description : A mRNA of eukaryotes can code for (A) Only one polypeptide (B) Two polypeptides (C) Three polypeptides (D) Five polypeptides

Last Answer : Answer : A

Streptomycin prevents synthesis of polypeptide by (A) Inhibiting initiation process (B) Releasing premature polypeptide (C) Inhibiting peptidyl transferase activity (D) Inhibiting translocation

Description : Streptomycin prevents synthesis of polypeptide by (A) Inhibiting initiation process (B) Releasing premature polypeptide (C) Inhibiting peptidyl transferase activity (D) Inhibiting translocation

Last Answer : Answer : A

In prokaryotes, chloramphenicol (A) Causes premature release of the polypeptide chain (B) Causes misreading of the mRNA (C) Depolymerises DNA (D) Inhibits peptidyl transferase activity

Description : In prokaryotes, chloramphenicol (A) Causes premature release of the polypeptide chain (B) Causes misreading of the mRNA (C) Depolymerises DNA (D) Inhibits peptidyl transferase activity

Last Answer : Answer : A

Tetracylin prevents synthesis of polypeptide by (A) Blocking mRNA formation from DNA (B) Releasing peptides from mRNA-tRNA complex (C) Competing with mRNA for ribosomal binding sites (D) Preventing binding of aminoacyl tRNA

Description : Tetracylin prevents synthesis of polypeptide by (A) Blocking mRNA formation from DNA (B) Releasing peptides from mRNA-tRNA complex (C) Competing with mRNA for ribosomal binding sites (D) Preventing binding of aminoacyl tRNA

Last Answer : Answer : D

The amino terminal of all polypeptide chain at the time of synthesis in E. coli is tagged to the amino acid residue: (A) Methionine (B) Serine (C) N-formyl methinine(D) N-formal serine

Description : The amino terminal of all polypeptide chain at the time of synthesis in E. coli is tagged to the amino acid residue: (A) Methionine (B) Serine (C) N-formyl methinine(D) N-formal serine

Last Answer : Answer : C

The smallest unit of DNA capable of coding for the synthesis of a polypeptide is (A) Operon (B) Repressor gene (C) Cistron (D) Replicon

Description : The smallest unit of DNA capable of coding for the synthesis of a polypeptide is (A) Operon (B) Repressor gene (C) Cistron (D) Replicon

Last Answer : Answer : C

__________ hormone is a single chain polypeptide having 32 amino acids with molecular weight of 3,600. (A) Testosteron (B) Thyroxine (C) Calcitonine (D) Vasopressin

Description : __________ hormone is a single chain polypeptide having 32 amino acids with molecular weight of 3,600. (A) Testosteron (B) Thyroxine (C) Calcitonine (D) Vasopressin

Last Answer : Answer : C

This pancreatic hormone increases the blood-sugar level: (A) Insulin (B) Glucagon (C) Pancreozymin (D) Pancreatic polypeptide

Description : This pancreatic hormone increases the blood-sugar level: (A) Insulin (B) Glucagon (C) Pancreozymin (D) Pancreatic polypeptide

Last Answer : Answer : B

All the following statements about epidermal growth factor are true except (A) It is a protein (B) It possess quaternary structure (C) Its receptor is made up of a single polypeptide chain (D) Its receptor possesses tyrosine kinase domain

Description : All the following statements about epidermal growth factor are true except (A) It is a protein (B) It possess quaternary structure (C) Its receptor is made up of a single polypeptide chain (D) Its receptor possesses tyrosine kinase domain

Last Answer : Answer : B

All the following statements about βendorphin are true except µ : (A) It is a polypeptide (B) Its precursor is pro-opio-melanocortin (C) Its receptors are represent in brain (D) Its action is blocked by morphine

Description : All the following statements about βendorphin are true except µ : (A) It is a polypeptide (B) Its precursor is pro-opio-melanocortin (C) Its receptors are represent in brain (D) Its action is blocked by morphine

Last Answer : Answer : D