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

1 Answer

Answer :

Ans:(a)  

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Description : The 3′ - 5′ phosphodiester linkages inside a polynucleotide chain serve to join (a) one DNA strand with the other DNA strand (b) one nucleoside with another nucleoside (c) one nucleotide with another nucleotide (d) one nitrogenous base with pentose sugar.

Last Answer : (c) one nucleotide with another nucleotide

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

Last Answer : Ans. Nucleotide

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.

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.

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

Description : A molecule of ATP contains a. Ribose But No Adenine. b. Phosphate But No Ribose. c. Adenine But No Deoxyribose. d. Deoxyribose But No Thymine.

Last Answer : b. Phosphate But No Ribose.

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

Last Answer : Answer : A

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

Last Answer : C

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

Last Answer : (C) Deoxyribose

Description : Deoxyribose sugar + Nitrogenous base is

Last Answer : Ans. Nucleoside

Description : The key substance in the synthesis of purine, phosphoribosyl pyrophosphate is formed by (A) α-D-ribose 5-phosphate (B) 5-phospho β-D-ribosylamine (C) D-ribose (D) Deoxyribose

Last Answer : Answer : A

Description : Difference between ribose and deoxyribose sugar. -Biology

Last Answer : answer:

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

Last Answer : Answer : C

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

Last Answer : A

Description : A carbohydrate found in DNA is (A) Ribose (B) Deoxyribose (C) Ribulose (D) All of these

Last Answer : B

Description : Which one of the following statements is not true of RNA? a. RNA contains the monosaccharide ribose. b. RNA is primarily a single-stranded molecule. c. RNA has a sugar-phosphate backbone. d. RNA contains five different nucleotides.

Last Answer : d. RNA contains five different nucleotides.

Description : The correct statement concerning RNA and DNA polymerases is (A) RNA polymerase use nucleoside diphosphates (B) RNA polymerase require primers and add bases at 5' end of the growing polynucleotide ... and DNA polymerases can add nucleotides only at the 3' end of the growing polynucleotide chain

Last Answer : Answer : D

Description : $ Proteins, polysaccharides and nucleic acid are the macromolecules of a cell. ! DNA contains Ribose Sugar.

Last Answer : $ Proteins, polysaccharides and nucleic acid are the macromolecules of a cell. ! DNA contains Ribose Sugar. A ... wrong D. If both As and R are wrong.

Description : Difference between ribose and deoxyribose? -Biology

Last Answer : answer:

Description : Nucleic acids can be detected by means of their absorption maxima near 260 nm. Their absorption in this range is due to (A) Proteins (B) Purines and pyrimidines (C) Ribose (D) Deoxyribose

Last Answer : Answer : B

Description : Acid hydrolysis of ribonucleic acid would yield the following major products: (A) d- deoxyribose, cytosine, adenine (B) d-ribose, thymine, Guanine (C) d-ribose, cytosine, uracil, thymine (D) d-ribose, uracil, adenine, guanine, cytosine

Last Answer : Answer : D

Description : Epimers of glucose is (A) Fructose (B) Galactose (C) Ribose (D) Deoxyribose

Last Answer : B

Description : The epimers of glucose is (A) Fructose (B) Galactose (C) Ribose (D) Deoxyribose

Last Answer : B

Description : The bond between sugar and nitrogenous base in case of DNA is known as (a) Gycosidic bond (b) Phosphodiester bond (c) H-bond (d) Peptide bond

Last Answer : (a) Gycosidic bond

Description : $ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and nitrogen bases called purines and pyrimi

Last Answer : $ The two strands of DNA run in an antiparallel directions DNA is formed of Deoxyribose sugar. Phosphorus and ... wrong D. If both As and R are wrong.

Description : DNA synthesis can be specifically measured by estimating the incorporation of radio-labelled (a) thymidine (b) deoxyribose sugar (c) uracil (d) adenine.

Last Answer : (c) uracil

Description : DNA synthesis can be specifically measured by estimating the incorporation of radio-labelled (a) thymidine (b) deoxyribose sugar (c) uracil (d) adenine.

Last Answer : (a) thymidine

Description : Which one of the following is NOT part of an ATP MOLECULE? a. Phosphate group b. Cofactor c. Ribose d. Adenine

Last Answer : b. Cofactor

Description : A nucleic acid has a "backbone" consisting of _____. a. The nitrogenous bases. b. sugar-phosphate-sugar-phosphate-... c. N-C-N-C-N-C-N-C-... d. functional groups.

Last Answer : b. sugar-phosphate-sugar-phosphate-...

Description : Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain? (a) Lipase (b) Protease (c) Endonuclease (d) Exonuclease

Last Answer : (c) Endonuclease

Description : Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain? (a) Lipase (b) Protease (c) Endonuclease (d) Exonuclease

Last Answer : c) G + C / A + T

Description : A nucleotide consists of (A) A nitrogenous base like choline (B) Purine + pyrimidine base + sugar + phosphorous (C) Purine or pyrimidine base + sugar (D) Purine or pyrimidine base + phosphorous

Last Answer : Answer : B

Description : A nucleoside consists of (A) Nitrogenous base (B) Purine or pyrimidine base + sugar (C) Purine or pyrimidine base + phosphorous (D) Purine + pyrimidine base + sugar + phosphorous

Last Answer : Answer : B

Description : The region of DNA known as TATA BOX is the site for binding of (A) DNA polymerase (B) DNA topoisomerase (C) DNA dependent RNA polymerase (D) Polynucleotide phosphorylase

Last Answer : Answer : C

Description : A key substance in the committed step of pyrimidines biosynthesis is (A) Ribose-5-phosphate (B) Carbamoyl phosphate (C) ATP (D) Glutamine

Last Answer : Answer : B

Description : A common substrate of HGPRTase, APRTase and PRPP glutamyl amidotransferase is (A) Ribose 5 phosphate (B) Phosphoribosyl pyrophosphate (C) Hypoxanthine (D) Adenosine

Last Answer : Answer : B

Description : In RNA, apart from ribose and phosphate, all following are present except (A) Adenine (B) Guanine (C) Thymine (D) Cytosine

Last Answer : Answer : C

Description : 6-Mercapto purine inhibits the conversion of (A) IMP→ XMP (B) Ribose 5 phosphate → PRPP (C) PRPP → 5-phospho →β -D-ribosylamine (D) Glycinamide ribosyl 5-phosphate → formylglycinamide ribosyl-5-phosphate

Last Answer : Answer : A

Description : The first pentose formed in HMP shunt is (A) Ribose-5-phosphate (B) Ribulose-5-phosphate (C) Xylose-5-phosphate (D)Xylulose-5-phosphate

Last Answer : Answer : B

Description : Glucose-6-phosphate dehydrogenase is induced by (A) 6-Phosphogluconolactone (B) Glucose-6-phosphate (C) Ribose-5-phosphate (D) Insulin

Last Answer : Answer : D

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

Description : Xylulose-5-phosphate serves as a donar of active glycolaldehyde, the acceptor is (A) Erythrose 4-phosphate (B) Ribose 5-phosphate (C) Glyceraldehyde 3-phosphate (D) Sedoheptulose 7-phosphate

Last Answer : Answer : A

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

Description : The 5- carbon compounds produced during dark reaction of photosynthesis is (A) Ribose phosphate (B) Xylulose phosphate (C) Ribulose bis phosphate (D) Seda heptulose phosphate

Last Answer : (C) Ribulose bis phosphate

Description : Which one of the following is a non - reducing carbohydrate? (a) Maltose (b) Sucrose (c) Lactose (d) Ribose 5-phosphate

Last Answer : (b) Sucrose

Description : Coenzyme A contains a nitrogenous base which is (A) Adenine (B) Guanine (C) Choline (D) Ethanolamine

Last Answer : Answer : A

Description : Lecithin contains a nitrogenous base named as (A) Ethanolamine (B) Choline (C) Inositol (D) All of these

Last Answer : Answer : B

Description : Coenzyme A contains a nitrogenous base which is (A) Adenine (B) Guanine (C) Choline (D) Ethanolamine

Last Answer : (A) Adenine

Description : Which nitrogenous base is not found in DNA? -Biology

Last Answer : answer:

Description : What is the nitrogenous base in DNA? -Biology

Last Answer : answer: