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) 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 : 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)
Description : Deoxyribose sugar + Nitrogenous base + phosphate group (PO2 )
Last Answer : Ans. Nucleotide
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 : DNA does not contain (A) Thymine (B) Adenine (C) Uracil (D) Deoxyribose
Last Answer : Answer : C
Description : The number of hydrogen bonds between adenine and thymine in DNA is (A) One (B) Two (C) Three (D) Four
Last Answer : Answer : B
Description : In DNA, three hydrogen bonds are formed between (A) Adenine and guanine (B) Adenine and thymine (C) Guanine and cytosine (D) Thymine and cytosine
Description : Which one of the following is not a constituent of RNA? (A) Deoxyribose (B) Uracil (C) Adenine (D) Thymine
Last Answer : Answer : A
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 : Sperm and egg nuclei fuse due to (a) base pairing of their DNA and RNA (b) formation of hydrogen bonds (c) mutual attraction due to differences in electrical charges (d) attraction of their protoplasts.
Last Answer : attraction of their protoplasts
Description : Deoxyribose sugar + Nitrogenous base is
Last Answer : Ans. Nucleoside
Description : True statements about the nucleic acid include: a. contains purine and pyrimidine which are bound together by covalent bonds b. there is always an equal concentration of purine and pyrimidine c. in RNA, ... d. introns is more common than exons on the DNA e. the histones mark the excision site
Last Answer : there is always an equal concentration of purine and pyrimidine
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 : The sugar moiety present in DNA is (A) Deoxyribose (B) Ribose (C) Lyxose (D) Ribulose
Description : The sugar found in DNA is (A) Xylose (B) Ribose (C) Deoxyribose (D) Ribulose
Last Answer : C
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
Last Answer : (a) thymidine
Last Answer : (C) Deoxyribose
Description : Substitution of a thymine base by adenine in DNA is known as ((A) Transposition (B) Transition (C) Transversion (D) Frameshift mutation
Description : In DNA, the complementary base of adenine is (A) Guanine (B) Cytosine (C) Uracil (D) Thymine
Description : Which of the following nitrogen base is not present in DNA? a. Thymine. b. Cytosine. c. Adenine. d. Uracil.
Last Answer : d. Uracil.
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
Description : In RNA, apart from ribose and phosphate, all following are present except (A) Adenine (B) Guanine (C) Thymine (D) Cytosine
Description : Lipoprotein present in cell membrane is by nature: (A) Hydrophilic (B) Hydrophobic (C) Both (A) and (B) (D) None of these
Description : Cholesterol is Amphipathic in nature because _________ a. It has hydrophilic regions. b. It has hydrophobic regions. c. It has both hydrophilic and hydrophobic regions. d. Both hydrophilic and hydrophobic regions are absent.
Last Answer : c. It has both hydrophilic and hydrophobic regions.
Description : Which of the following statements is correct? (a) Adenine pairs with thymine through two H-bonds. (b) Adenine pairs with thymine through one H-bond. (c) Adenine pairs with thymine through three H-bonds. (d) Adenine does not pair with thymine
Last Answer : ) Adenine pairs with thymine through two H-bonds.
Description : Which one of the following pairs is matched correctly? a. Ions - covalent bonds b. Carbon - organic compounds c. Glucose - enzyme d. Thymine - amino acid
Last Answer : b. Carbon - organic compounds
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
Description : The sugar found in RNA is (A) Ribose (B) Deoxyribose (C) Ribulose (D) Erythrose
Last Answer : A
Description : The outside of the DNA double helix is made of alternating groups of deoxyribose sugars and _____.?
Last Answer : phosphates
Description : A carbohydrate found in DNA is (A) Ribose (B) Deoxyribose (C) Ribulose (D) All of these
Last Answer : B
Description : In nucleotides, phosphate is attached to sugar by (A) Salt bond (B) Hydrogen bond (C) Ester bond (D) Glycosidic bond
Description : The number of hydrogen bonds between guanine and cytosine in DNA is – (1) 2 (2) 3 (3) 4 (4) 1
Last Answer : (2) 3 Explanation: The chemistry of the nitrogenous bases is really the key to the function of DNA. It allows something called complementary base pairing. Cytosine can form three hydrogen bonds with guanine, and adenine can form two hydrogen bonds with thymine.
Description : The number of hydrogen bonds between guanine and cytosine in DNA is (1) 2 (2) 3 (3) 4 (4) 1
Last Answer : 3
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
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
Description : Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by (a) base-sugar-phosphate (b) base-sugar-OH (c) (base-sugar-phosphate)n (d) sugar-phosphate.
Last Answer : (a) base-sugar-phosphate
Description : Melting temperature of DNA is increased by its (A) A and T content (B) G and C content (C) Sugar content (D) Phosphate content
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.
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
Description : Soaps remove dirt by (A) Increasing the surface tension (B) Decreasing wettability (C) Supplying hydrophilic group (D) None of these
Last Answer : (D) None of these
Description : Hydrophilic group of a soap or detergent solution is (A) Water hating (B) Soil loving (C) Water loving (D) None of these
Last Answer : (C) Water loving
Description : The number of adenine and thymine bases is equal in (A) DNA (B) mRNA (C) tRNA (D) rRNA
Description : In DNA segment of six coils, 22 bp are linked by two hydrogen bonds. How many cytosine would be present ?
Last Answer : In DNA segment of six coils, 22 bp are linked by two hydrogen bonds. How many cytosine would be present ? A. 22 B. 38 C. 44 D. 76
Description : $ DNA replication is semiconservative. ! Helicases are the enzymes which can break the hydrogen bonds between the nuclotides of DNA
Last Answer : $ DNA replication is semiconservative. ! Helicases are the enzymes which can break the hydrogen bonds between the ... D. If both As and R are wrong.
Description : DNA rich in G-C pairs have (A) 1 Hydrogen bond (B) 2 Hydrogen bonds (C) 3 Hydrogen bonds (D) 4 Hydrogen bonds
Description : DNA rich in A-T pairs have (A) 1 Hydrogen bond (B) 2 Hydrogen bonds (C) 3 Hydrogen bonds(D) 4 Hydrogen bonds
Description : DNA nucleotides are attached by (a) Hydrogen bonds (b) Covalent bonds (c) VANDER Wall's force (d) Electrovalent bonds
Last Answer : Ans:(b)