Melting temperature of DNA is increased by its (A) A and T content (B) G and C content (C) Sugar content (D) Phosphate content

Melting temperature of DNA is increased by its (A) A and T content (B) G and C content (C) Sugar content (D) Phosphate content
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Buoynat density of DNA is increased by its (A) A and T content (B) G and C content (C) Sugar content (D) None of these

Description : Buoynat density of DNA is increased by its (A) A and T content (B) G and C content (C) Sugar content (D) None of these

Last Answer : Answer : B

An increased melting temperature of duplex DNA results from a high content of (A) Adenine + Guanine (B) Thymine + Cytosine (C) Cytosine + Guanine (D) Cytosine + Adenine

Description : An increased melting temperature of duplex DNA results from a high content of (A) Adenine + Guanine (B) Thymine + Cytosine (C) Cytosine + Guanine (D) Cytosine + Adenine

Last Answer : Answer : C

Relative proportions of G and C versus A and T in DNA can be determined by its (A) Melting temperature (B) Buoyant density (C) Both (A) and (B) (D) None of these

Description : Relative proportions of G and C versus A and T in DNA can be determined by its (A) Melting temperature (B) Buoyant density (C) Both (A) and (B) (D) None of these

Last Answer : Answer : C

DNA po lymerase of T. aquat icus is preferred to that of E. coli in PCR because (A) It replicates DNA more efficiently (B) It doesn’t require primers (C) It is not denatured at the melting temperature of DNA (D) It doesn’t cause errors in replication

Description : DNA po lymerase of T. aquat icus is preferred to that of E. coli in PCR because (A) It replicates DNA more efficiently (B) It doesn’t require primers (C) It is not denatured at the melting temperature of DNA (D) It doesn’t cause errors in replication

Last Answer : Answer : C

Which one of the following statements concerning glucose-6-phosphate dehydrogenase deficiency is correct? (A) Young R.B.Cs, particularly reticulocytes, contain the highest enzyme activity cells show less enzyme activity (B) Glucose-6-P Dehydroglucose deficiency leads to disfuction of many tissues (C) G-6-p Dehydroglucose deficiency is due to a single deletion of a large sequence of DNA in the G-6-PD gene (D) G-6-PD deficiency is precipitated by ingestion of drugs such as aspirin

Description : Which one of the following statements concerning glucose-6-phosphate dehydrogenase deficiency is correct? (A) Young R.B.Cs, particularly reticulocytes, contain the highest enzyme activity cells show less enzyme ... PD gene (D) G-6-PD deficiency is precipitated by ingestion of drugs such as aspirin

Last Answer : Answer : A

Melting temperature of DNA is the temperature at which (A) Solid DNA becomes liquid (B) Liquid DNA evaporates (C) DNA changes from double helix into supercoiled DNA (D) Native double helical DNA is denatured

Description : Melting temperature of DNA is the temperature at which (A) Solid DNA becomes liquid (B) Liquid DNA evaporates (C) DNA changes from double helix into supercoiled DNA (D) Native double helical DNA is denatured

Last Answer : Answer : D

Polynucleotide chain of DNA contains (a) a nitrogenous base, deoxyribose sugar and phosphate group (b) a nitrogenous base, ribose sugar and phosphate group (c) deoxyribose sugar ribose sugar and phosphate group (d) a nitrogenous base and phosphate group only

Description : Polynucleotide chain of DNA contains (a) a nitrogenous base, deoxyribose sugar and phosphate group (b) a nitrogenous base, ribose sugar and phosphate group (c) deoxyribose sugar ribose sugar and phosphate group (d) a nitrogenous base and phosphate group only

Last Answer : Ans:(a)

The hydrophilic nature of DNA is due to the presence of – (1) thymine base (2) Biotic resources (3) phosphate group (4) deoxyribose sugar

Description : The hydrophilic nature of DNA is due to the presence of – (1) thymine base (2) Biotic resources (3) phosphate group (4) deoxyribose sugar

Last Answer : (2) Biotic resources Explanation: The phosphate groups on DNA are ionic and charged. Each phosphategroup on the DNA back-bone is one unit of negative charge (-1). Charged molecules ... DNA has two hydrophilic polar external backbones made of sugars and phosphate groups joined by ester bonds.

The hydrophilic nature of DNA is due to the presence of - (1) thymine base (2) a number of hydrogen bonds (3) phosphate group (4) deoxyribose sugar

Description : The hydrophilic nature of DNA is due to the presence of - (1) thymine base (2) a number of hydrogen bonds (3) phosphate group (4) deoxyribose sugar

Last Answer : (2) a number of hydrogen bonds Explanation: The phosphate groups on DNA are ionic and charged. Each phosphate group on the DNA back-bone is one unit of negative charge (-1). Charged ... . DNA has two hydrophilic polar external backbones made of sugars and phosphate groups joined by ester bonds.

Following statements describe the characteristics of the enzyme restriction endonuclease. Identify the incorrect statement. (a) The enzyme recognises a specific palindromic nucleotide sequence in the DNA. (b) The enzyme cuts DNA molecule at identified position within the DNA. (c) The enzyme binds DNA at specific sites and cuts only one of the two strands. (d) The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.

Description : Following statements describe the characteristics of the enzyme restriction endonuclease. Identify the incorrect statement. (a) The enzyme recognises a specific palindromic nucleotide sequence in the DNA. (b) ... (d) The enzyme cuts the sugar-phosphate backbone at specific sites on each strand.

Last Answer : (c) The enzyme binds DNA at specific sites and cuts only one of the two strands.

Pick the right difference between a DNA and RNA a) Sugar and phosphate b) sugar and purines c) purines and phosphate d) sugar and pyrimidines

Description : Pick the right difference between a DNA and RNA a) Sugar and phosphate b) sugar and purines c) purines and phosphate d) sugar and pyrimidines

Last Answer : c) purines and phosphate

The hydrophilic nature of DNA is due to the presence of : (1) thymine base (2) a number of hydrogen bonds (3) phosphate group (4) deoxyribose sugar

Description : The hydrophilic nature of DNA is due to the presence of : (1) thymine base (2) a number of hydrogen bonds (3) phosphate group (4) deoxyribose sugar

Last Answer : a number of hydrogen bonds

In nucleotides, phosphate is attached to sugar by (A) Salt bond (B) Hydrogen bond (C) Ester bond (D) Glycosidic bond

Description : In nucleotides, phosphate is attached to sugar by (A) Salt bond (B) Hydrogen bond (C) Ester bond (D) Glycosidic bond

Last Answer : Answer : C

Intestinal nucleosidases act on nucleosides and produce (A) Purine base only (B) Phosphate only (C) Sugar only (D) Purine or pyrimidine bases and sugars

Description : Intestinal nucleosidases act on nucleosides and produce (A) Purine base only (B) Phosphate only (C) Sugar only (D) Purine or pyrimidine bases and sugars

Last Answer : Answer : D

The co-enzyme containing an automatic hetero ring in the structure is (A) Biotin (B) TPP (C) Sugar Phosphate (D) Co-enzyme

Description : The co-enzyme containing an automatic hetero ring in the structure is (A) Biotin (B) TPP (C) Sugar Phosphate (D) Co-enzyme

Last Answer : Answer : C

The four membered aldose sugar phosphate formed in HMP shunt pathway is (A) Xylulose P (B) Erythrulose P (C) Erythrose P (D) Ribulose P

Description : The four membered aldose sugar phosphate formed in HMP shunt pathway is (A) Xylulose P (B) Erythrulose P (C) Erythrose P (D) Ribulose P

Last Answer : C

PTH causes all of the following except (A) Increased intestinal absorption of calcium (B) Increased intestinal absorption of phosphate (C) Increased tubular reabsorption of calcium (D) Increased tubular reabsorption of phosphate

Description : PTH causes all of the following except (A) Increased intestinal absorption of calcium (B) Increased intestinal absorption of phosphate (C) Increased tubular reabsorption of calcium (D) Increased tubular reabsorption of phosphate

Last Answer : Answer : D

An important finding in Hyperammonemia type II is (A) Increased serum gluatmine level (B) Enlarged liver (C) Mental retardation (D) Increased carbamoyl phosphate synthetase level

Description : An important finding in Hyperammonemia type II is (A) Increased serum gluatmine level (B) Enlarged liver (C) Mental retardation (D) Increased carbamoyl phosphate synthetase level

Last Answer : Answer : C

Pentosuria is a rare hereditary disease is characterized by increased urinary excretion of (A) L-xylulose (B) Xylitol (C) Xylulose 5-phosphate (D) Ribose 5-phosphate

Description : Pentosuria is a rare hereditary disease is characterized by increased urinary excretion of (A) L-xylulose (B) Xylitol (C) Xylulose 5-phosphate (D) Ribose 5-phosphate

Last Answer : Answer : A

Hepatocellular jaundice as compared to pure obstructive type of jaundice is characterized by (A) Increased serum alkaline phosphate, LDH and ALT (B) Decreased serum alkaline phosphatase, LDH and ALT (C) Increased serum alkaline phosphatase and decreased levels of LDH and ALT (D) Decreased serum alkaline phosphatase and increased serum LDH and ALT

Description : Hepatocellular jaundice as compared to pure obstructive type of jaundice is characterized by (A) Increased serum alkaline phosphate, LDH and ALT (B) Decreased serum alkaline phosphatase, LDH and ALT (C ... levels of LDH and ALT (D) Decreased serum alkaline phosphatase and increased serum LDH and ALT

Last Answer : Answer : D

Which one of the following would be expected in pyruvate kinase deficiency? (A) Increased levels of lactate in the R.B.C (B) Hemolytic anemia (C) Decreased ratio of ADP to ATP in R.B.C (D) Increased phosphorylation of Glucose to Glucose-6-phosphate

Description : Which one of the following would be expected in pyruvate kinase deficiency? (A) Increased levels of lactate in the R.B.C (B) Hemolytic anemia (C) Decreased ratio of ADP to ATP in R.B.C (D) Increased phosphorylation of Glucose to Glucose-6-phosphate

Last Answer : B

In pentose phosphate pathway, D-ribulose5-phosphate is converted to D-ribose-5- phosphate by the enzyme: (A) Fumarase (B) Ketoisomerase (C) G-6-PD (D) Epimerase

Description : In pentose phosphate pathway, D-ribulose5-phosphate is converted to D-ribose-5- phosphate by the enzyme: (A) Fumarase (B) Ketoisomerase (C) G-6-PD (D) Epimerase

Last Answer : Answer : B

The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Description : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Last Answer : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` ... +Zn rarr Mg+ZnO` D. `ZnO+Mg rarrZn+MgO`

The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Description : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Last Answer : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a ... gt 500^(@)C " but " lt 1000^(@)C`

The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Description : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a function of temperature for some reactio

Last Answer : The points noted by arrows are melting and boiling points of the metal zinc and magnasium. `Delta G^(0)` as a ... C. `500^(@)C` D. `1200^(@)C`

Optimum temperature of DNA polymerase of T. aquaticus is (A) 30°C (B) 37°C (C) 54°C (D) 72°C

Description : Optimum temperature of DNA polymerase of T. aquaticus is (A) 30°C (B) 37°C (C) 54°C (D) 72°C

Last Answer : Answer : D

What is the anti parallel DNA strand of 5'-C-C-A-T-C-T-T-G-3'?

Description : What is the anti parallel DNA strand of 5'-C-C-A-T-C-T-T-G-3'?

Last Answer : What is the answer ?

What is complementary mRNA sequences for DNA bases A-T-C-A-G-G?

Description : What is complementary mRNA sequences for DNA bases A-T-C-A-G-G?

Last Answer : What is the answer ?

In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are (a) G 17%, A 33%, T 33% (b) G 8.5%, A 50%, T 24.5% (c) G 34%, A 24.5%, T 24.5% (d) G 17%, A 16.5%, T 32.5%.

Description : In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are (a) G 17%, A 33%, T 33% (b) G 8.5%, A 50%, T 24.5% (c) G 34%, A 24.5%, T 24.5% (d) G 17%, A 16.5%, T 32.5%.

Last Answer : (a) G 17%, A 33%, T 33%

Which is not consistent with double helical structure of DNA? (a) A = T, C = G (b) Density of DNA decreases on heating. (c) A + T/C + G is not constant. (d) Both (a) and (b)

Description : Which is not consistent with double helical structure of DNA? (a) A = T, C = G (b) Density of DNA decreases on heating. (c) A + T/C + G is not constant. (d) Both (a) and (b)

Last Answer : (c) A + T/C + G is not constant

When sugar canalize on being heated above its melting point is physical change or chemical?

Description : When sugar canalize on being heated above its melting point is physical change or chemical?

Last Answer : Melting is a physical process.

All of the following statements about bacterial promoters are true except (A) They are smaller than eukaryotic promoters (B) They have two consensus sequences upstream from the transcription star site (C) TATA box is the site for attachment of RNA polymerase (D) TATA box has a high melting temperature

Description : All of the following statements about bacterial promoters are true except (A) They are smaller than eukaryotic promoters (B) They have two consensus sequences upstream from the transcription star site (C) ... is the site for attachment of RNA polymerase (D) TATA box has a high melting temperature

Last Answer : Answer : D

Iron absorption is hampered by (A) In achlorhydria (B) When ferritin content of intestinal mucosa is low (C) When saturation of plasma transferring is low (D) When erythropoietic activity is increased

Description : Iron absorption is hampered by (A) In achlorhydria (B) When ferritin content of intestinal mucosa is low (C) When saturation of plasma transferring is low (D) When erythropoietic activity is increased

Last Answer : Answer : A

In DNA, genetic information is located in (A) Purine bases (B) Pyrimidine bases (C) Purine and pyrimidine bases (D) sugar

Description : In DNA, genetic information is located in (A) Purine bases (B) Pyrimidine bases (C) Purine and pyrimidine bases (D) sugar

Last Answer : Answer : C

Which of the following contains a deoxy sugar? (A) RNA (B) DNA (C) ATP (D) UTP

Description : Which of the following contains a deoxy sugar? (A) RNA (B) DNA (C) ATP (D) UTP

Last Answer : Answer : B

The sugar moiety present in DNA is (A) Deoxyribose (B) Ribose (C) Lyxose (D) Ribulose

Description : The sugar moiety present in DNA is (A) Deoxyribose (B) Ribose (C) Lyxose (D) Ribulose

Last Answer : Answer : A

The sugar found in DNA is (A) Xylose (B) Ribose (C) Deoxyribose (D) Ribulose

Description : The sugar found in DNA is (A) Xylose (B) Ribose (C) Deoxyribose (D) Ribulose

Last Answer : C

The sugar found in DNA is (A) Xylose (B) Ribose (C) Deoxyribose (D) Ribulose

Description : The sugar found in DNA is (A) Xylose (B) Ribose (C) Deoxyribose (D) Ribulose

Last Answer : (C) Deoxyribose

What is the melting point of sugar ?

Description : What is the melting point of sugar ?

Last Answer : The melting point of sugar is 160 degrees.

When pressure is increased the melting point of ice – (1) increases (2) does not change (3) decreases (4) depends on the impurities in the ice

Description : When pressure is increased the melting point of ice – (1) increases (2) does not change (3) decreases (4) depends on the impurities in the ice

Last Answer : (3) decreases Explanation: In this case. if we increase the pressure on the ice the ice-water system wants to try to lower it again. It can do that by making itself fit into a ... the melting point of ice decreases because of the inversal relationship between the pressure and melting point of ice.

Which of the following best explains why the melting points of saturated fats increase with increasing molecular weight? (a) decreased hydrogen bonding (b) increased hydrogen bonding (c) decreased intermolecular van der Waal’s interactions (d) increased intermolecular van der Waal’s interactions

Description : Which of the following best explains why the melting points of saturated fats increase with increasing molecular weight? (a) decreased hydrogen bonding (b) increased hydrogen bonding (c) decreased intermolecular van der Waal’s interactions (d) increased intermolecular van der Waal’s interactions

Last Answer : increased intermolecular van der Waal’s interactions

When pressure is increased the melting point of ice (1) increases (2) does not change (3) decreases (4) depends on the impurities in the ice

Description : When pressure is increased the melting point of ice (1) increases (2) does not change (3) decreases (4) depends on the impurities in the ice

Last Answer : decreases

One of the causes of hemolytic jaundice is (A) G-6 phosphatase deficiency (B) Increased conjugated bilirubin (C) Glucokinase deficiency (D) Phosphoglucomutase deficiency

Description : One of the causes of hemolytic jaundice is (A) G-6 phosphatase deficiency (B) Increased conjugated bilirubin (C) Glucokinase deficiency (D) Phosphoglucomutase deficiency

Last Answer : Answer : A

A nucleoside is: (a) purine/pyramidine + phosphate (b) purine/pyramidine + sugar (c) Pyramidine + purine + phosphate (d) Purine + sugar + phosphate

Description : A nucleoside is: (a) purine/pyramidine + phosphate (b) purine/pyramidine + sugar (c) Pyramidine + purine + phosphate (d) Purine + sugar + phosphate

Last Answer : Ans. ((b))

Deoxyribose sugar + Nitrogenous base + phosphate group (PO2 )

Description : Deoxyribose sugar + Nitrogenous base + phosphate group (PO2 )

Last Answer : Ans. Nucleotide

The main chemical substance present in the bones and teeth of animals is: A. Sodium Chloride B. Sugar C. Calcium Phosphate D. Calcium sulphate

Description : The main chemical substance present in the bones and teeth of animals is: A. Sodium Chloride B. Sugar C. Calcium Phosphate D. Calcium sulphate

Last Answer : ANSWER: C

The main chemical substance present in the bones and teeth of animal is (a) sodium chloride (b) sugar (c) calcium phosphate (d) calcium sulphate

Description : The main chemical substance present in the bones and teeth of animal is (a) sodium chloride (b) sugar (c) calcium phosphate (d) calcium sulphate

Last Answer : Ans:(c)

During dehydration what is the substance that is usually lost by the body? (1) Sugar (2) Sodium chloride (3) Calcium phosphate (4) Potassium chloride

Description : During dehydration what is the substance that is usually lost by the body? (1) Sugar (2) Sodium chloride (3) Calcium phosphate (4) Potassium chloride

Last Answer : (2) Sodium chloride Explanation: Sodium chloride, also known as salt, common salt, table salt or halite, is an ionic compound with the formula NaC1, representing equal proportions of sodium and ... . It is used as a carrier for other ingredients, dehydrating agent, enzyme inhibitor and tenderizer.

A nucleotide is formed of (a) purine, pyrimidine and phosphate (b) purine, sugar and phosphate (c) nitrogen base, sugar and phosphate (d) pyrimidine, sugar and phosphate

Description : A nucleotide is formed of (a) purine, pyrimidine and phosphate (b) purine, sugar and phosphate (c) nitrogen base, sugar and phosphate (d) pyrimidine, sugar and phosphate

Last Answer : (c) nitrogen base, sugar and phosphate