Description : Thiamine is (A) Water-soluble vitamin (B) Fat soluble vitamin (C) Purine base (D) Pyrimidine base
Last Answer : Answer : D
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 : n the DNA molecule, (a) the proportion of adenine in relation to thymine varies with the organism (b) there are two strands which run anti- parallel-one in 5′ → 3′ direction and other in 3′ → ... is not always equal (d) there are two strands which run parallel in the 5′ → 3′ direction.
Last Answer : (b) there are two strands which run anti- parallel-one in 5′ → 3′ direction and other in 3′ → 5′
Description : Assertion: Uric acid is produced by the metabolism of purine and pyrimidine. Reason: Uric acid has high toxicity and is soluble in water.
Last Answer : Assertion: Uric acid is produced by the metabolism of purine and pyrimidine. Reason: Uric acid has ... D. If both Assertion and Reason are false
Description : Vitamin B12 has a complex ring structure (corrin ring) consisting of four (A) Purine rings (B) Pyrimidine rings (C) Pyrrole rings (D) Pteridine rings
Last Answer : Answer : C
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 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
Description : Which purine base is found in RNA? (a) Thymine (b) Uracil (c) Cytosine (d) Guanine
Last Answer : (d) Guanine
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 : Which one of the following contributes nitrogen atoms to both purine and pyrimidine rings? (A) Aspartate (B) Carbanoyl phosphate (C) Carbondioxide (D) Tetrahydrofolate
Last Answer : Answer : A
Description : Which one of the following causes frame shift mutation? (A) Transition (B) Transversion (C) Deletion (D) Substitution of purine to pyrimidine
Description : In DNA, genetic information is located in (A) Purine bases (B) Pyrimidine bases (C) Purine and pyrimidine bases (D) sugar
Description : The structural stability of the double helix of DNA is as cribbed largely to (A) Hydrogen bonding between adjacent purine bases (B) Hydrophobic bonding between staked purine and ... Hydrogen bonding between adjacent pyrimidine bases (E) Hydrogen bonding between purine and pyrimidine bases
Description : The available PRPP is used preferentially for (A) De novo synthesis of purine nucleotides (B) De novo synthesis of pyrimidine nucleotides (C) Salvage of purine bases (D) Salvage of pyrimidine bases
Description : 5-Phosphoribosyl-1-pyrophosphate is required for the synthesis of (A) Purine nucleotides (B) Pyrimidine nucleotides (C) Both (A) and (B) (D) None of these
Description : Ultraviolet light can damage a DNA strand causing (A) Two adjacent purine residue to form a covalently bounded dimer (B) Two adjacent pyrimidine residues to form covalently bonded dimer (C) Disruption of phosphodiesterase linkage (D) Disruption of non-covalent linkage
Description : Genetic code is (A) Collection of codon (B) Collection of amino acids (C) Collection of purine nucleotide (D) Collection of pyrimidine nucleotide
Description : Gout is a metabolic disorder of catabolism of (A) Pyrimidine (B) Purine (C) Alanine (D) Phenylalanine
Description : Pyrimidine and purine nucleoside biosynthesis share a common precursor: (A) PRPP (B) Glycine (C) Fumarate (D) Alanine
Description : In RNA molecule guanine content does not necessarily equal its cytosine content nor does its adenine content necessarily equal its uracil content since it is a (A) Single strand molecule ( ... stranded molecule (C) Double stranded helical molecule (D) Polymer of purine and pyrimidine ribonucleotides
Description : All mammalian steroid hormones are formed from (A) Purine (B) Pyrimidine (C) Cholesterol (D) Pyrrole
Description : Which of the following contributes nitrogen atoms to both purine and pyrimidine rings? (A) Aspartate (B) Carbamoyl phosphate (C) CO2 (D) Glutamine
Description : Pyrimidine thymine occurs only in a. RNA b. DNA c. Both d. All
Last Answer : DNA
Description : Which two of the following four bases in DNA are pyrimidine (pron: pie-rim-eh-den) bases? a) cytosine b) thymine c) adenine d) guanine (pron: gwa - neen)
Last Answer : ANSWER: A and B -- CYTOSINE and THYMINE
Description : Which two of the following four bases in DNA are purine bases? a) adenine b) thymine c) cytosine d) guanine
Last Answer : ANSWER: A and D -- ADENINE and GUANINE
Description : Difference between purine and pyrimidine. -Biology
Last Answer : answer:
Description : Adenine is (a) purine (b) pyrimidine (c) nucleoside (d) nucleotide.
Last Answer : (a) purine
Description : Uridine, present only in RNA is a (a) nucleoside (b) nucleotide (c) purine (d) pyrimidine.
Last Answer : a) nucleoside
Description : Alkylating agents exert cytotoxic action by inducing: A. Breakage of DNA strand B. Cross linking of DNA strands C. Abnormal pairing of purine and pyrimidine bases D. All of the above
Last Answer : D. All of the above
Description : Substitution of a thymine base by adenine in DNA is known as ((A) Transposition (B) Transition (C) Transversion (D) Frameshift mutation
Description : In RNA, the complementary base of adenine is (A) Cytosine (B) Guanine (C) Thymine (D) Uracil
Description : The complementary base of adenine in RNA is (A) Thymine (B) Cystosine (C) Guanine (D) Uracil
Description : In DNA, the complementary base of adenine is (A) Guanine (B) Cytosine (C) Uracil (D) Thymine
Description : A nitrogenous base that does not occur in mRNA is (A) Cytosine (B) Thymine (C) Uracil (D) All of these
Description : The nitrogenous base present in the RNA molecule is (A) Thymine (B) Uracil (C) Xanthine (D) Hypoxanthine
Description : A substituted pyrimidine base of pharmacological value is (A) 5-Iododeoxyuridine (B) Cytisine arabinoside (C) 5-Fluorouracil (D) All of these
Description : Which one of the following is a fat-soluble vitamin and its related deficiency disease
Last Answer : Which one of the following is a fat-soluble vitamin and its related deficiency disease A. ... Retinol - Xerophthalmia D. Cobalamine - Beri-beri
Last Answer : Which one of the following is a fat-soluble vitamin and its related deficiency disease A. ... C. Cobalamine-Beri-beri D. Calciferol-Pellagra
Description : Which one of the following is a fat-soluble vitamin and its related deficiency disease? (a) Retinol - Xerophthalmia (b) Cobalamine - Beri-beri (c) Calciferol - Pellagra (d) Ascorbic acid - Scurvy
Last Answer : (a) Retinol - Xerophthalmia
Description : The common features of introns include all the following except (A) The base sequence begins with GU (B) The base sequence ends with AG (C) The terminal AG sequence is preceded by a purine rich tract of ten nucleotides (D) An adenosine residue in branch site participates in splicing
Description : Folic acid or folate consists of the (A) Base pteridine, p-amino benzoic acid and asparate (B) Base purine, p-amino benzoic acid and glutamate (C) Base pteridine, p-amino benzoic acid and glutamate (D) Base purine, p-hydroxy benzoic acid and glutamate
Description : Lipids have the following properties: (A) Insoluble in water and soluble in fat solvent (B) High energy content (C) Structural component of cell membrane (D) All of these
Description : Fat soluble vitamins are (A) Soluble in alcohol (B) one or more Propene units (C) Stored in liver (D) All these
Description : A water soluble form of vitamin K is (A) Phylloquinone (B) Farnoquinone (C) Menadione (D) None of these
Description : A water soluble vitamin deficient in egg is (A) Thiamin (B) Ribofalvin (C) Ascrobic acid (D) Cobalamin
Description : Complementary base pair for thymine. -Biology
Description : What type of mutation remove a thymine base?
Last Answer : Need answer
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.