Description : If a double stranded DNA has 20% Thymine, the percentage of Guanine in the DNA a) 30% b) 10% c) 90% d) 40%
Last Answer : a) 30%
Description : The structure of DNA is a double helix formed by two strands of DNA sequence. This sequence consists of 4 different nucleotides- Adenine, Thymine, Cytosine and Guanine. How do the nucleotides on one strand interact with the nucleotides on the second strand to maintain the helical shape of DNA?
Last Answer : Complementary Base Pairing. Adenine complementary base pairs with Thymine and Guanine complementary base pairs with Cytosine.
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
Last Answer : Answer : A
Description : Exposure of DNA to ultraviolet radiation can lead to the formation of (A) Adenine dimers (B) Guanine dimers (C) Thymine dimers (D) Uracil dimers
Last Answer : Answer : C
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 : In DNA, the complementary base of adenine is (A) Guanine (B) Cytosine (C) Uracil (D) Thymine
Last Answer : Answer : D
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
Description : In DNA molecule (A) Guanine content does not equal cytosine content (B) Adenine content does not equal thymine content (C) Adenine content equals uracil content (D) Guanine content equals cytosine content
Description : DNA molecules are composed of deoxyribonucleotides of (a) Adenine and guanine (b) Adenine, guanine and cytosine (c) Adenine, guanine, cytosine and thymine (d) None of the above
Last Answer : Ans:(c)
Description : Purines found both in DNA and RNA are (a) cytosine and thymine (b) adenine and thymine (c) adenine and guanine (d) guanine and cytosine.
Last Answer : (c) adenine and guanine
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 : 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 : 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 : What are adenine guanine cytosine and thymine?
Last Answer : Cytosine thymine guanine and adenine are the nitrogenous bases found in the nucleotides that form DNA.DNA is made up of 3 parts:(1)Phosphate group(2)Deoxyribose(3)Nitrogen containing base.Complimentary ... of adenine->thymine Guanin -> cytosine and visa/versa. In RNA thymine is replaced with uracil
Description : In RNA, apart from ribose and phosphate, all following are present except (A) Adenine (B) Guanine (C) Thymine (D) Cytosine
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
Description : Hybridoma cells are selected by culturing them in a medium containing (A) Adenine, guanine, cytosine and thymine (B) Adenine, guanine, cytosine and uracil (C) Hypoxanthine, aminopterin and thymine (D) Hypoxanthine, aminopterin and thymidine
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 : Which base in place of thymine is present in RNA? (1) Adenine (2) Guanine (3) Uracil (4) Cytosine
Last Answer : (3) Uracil Explanation: DNA (Deoxyribonucleic acid) contains 2-cleoxy-ribose sugar. It contains cytosine and thymine as pyrimidine bases and guanine and adenine as purine bases. RNA (Ribonucleic ... sugar. It contains cytosine and uracil as pyrimidine bases and guanine and adenine as purine bases.
Description : Guanine is always paired with a. adenine b. cytosine c. thymine d. uracil
Last Answer : cytosine
Description : Adenine is always paired with a. guanine b. cytosine c. thymine d. uracil
Last Answer : thymine
Description : Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it? (a) Guanine, Adenine - Purines (b) Adenine, Thymine - Purines (c) Thymine, Uracil - Pyrimidines (d) Uracil, Cytosine - Pyrimidines
Last Answer : (b) Adenine, Thymine - Purines
Description : In RNA, thymine is replaced by (a) adenine (b) guanine (c) cytosine (d) uracil.
Last Answer : d) uracil.
Description : The telomeres of eukaryotic chromosomes consist of short sequences of (a) thymine rich repeats (b) cytosine rich repeats (c) adenine rich repeats (d) guanine rich repeats.
Last Answer : (d) guanine rich repeats.
Description : Which base in place of thymine is present in RNA ? (1) Adenine (2) Guanine (3) Uracil (4) Cytosine
Last Answer : Uracil
Description : Whcih of the following compound is present in RNA but absent from DNA? (A) Thymine (B) Cytosine (C) Uracil (D) Guanine
Description : In a DNA percentage of thymine is 20% then what will be percentage of guanine? (a) 20% (b) 40% (c) 30% (d) 60%
Last Answer : (c) 30%
Description : Substitution of a thymine base by adenine in DNA is known as ((A) Transposition (B) Transition (C) Transversion (D) Frameshift mutation
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 : The number of adenine and thymine bases is equal in (A) DNA (B) mRNA (C) tRNA (D) rRNA
Description : DNA does not contain (A) Thymine (B) Adenine (C) Uracil (D) Deoxyribose
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 : Substitution of an adenine base by guanine in DNA is known as (A) Transposition (B) Transition (C) Transversion (D) Frameshift mutation
Description : The nucleic acid base found in mRNA but not in DNA is (A) Adenine (B) Cytosine (C) Guanine (D) Uracil
Description : Which of the following statement(s) is/are true concerning DNA? a. DNA is contained only in the nucleus of the cell b. DNA strands are encoded by the sequence of four bases-adenine, guanine, cytosine ... DNA is the intron, a sequence of three bases d. There are an infinite number of possible codons
Last Answer : Answer: a The genetic blueprint of an organism is carried in the nucleus of every cell, encoded by the sequence of four bases-adenine, guanine, cytosine and thymine, which together make up ... codons. Sixty-one of these code for amino acids and three are termination signals called stop codons
Description : With regard to DNA molecules: a. they contain adenine, cytosine, guanine and uracil bases b. they can be detected with Western blotting c. they can be detected with Southern blotting d. they are denatured at temperature of 1000C
Last Answer : they can be detected with Southern blotting
Description : Which of the following is NOT a base in DNA? w) uracil x) guanine y) adenine z) cytosine
Last Answer : ANSWER: W -- URACIL
Description : 6) Q6. If the total amount of guanine and cytosine in an isolated DNA segment is 60 % of the total , what will be the % of adenine in this DNA segment. A) 10% b ) 20 % c) 30% d) 40 %
Last Answer : 6b 20 %
Description : 2, 4-Dioxypyrimidine is (A) Thymine (B) Cystosine (C) Uracil (D) Guanine
Description : Which purine base is found in RNA? (a) Thymine (b) Uracil (c) Cytosine (d) Guanine
Last Answer : (d) Guanine
Description : Which of the following nucleoside diphosphates is used most often in carbohydrate anabolism? A.Uridine diphosphate B.Adenosine diphosphate C.Guanine diphosphate D.Thymine diphosphate
Last Answer : A.Uridine diphosphate
Description : Which one of the following is not a constituent of RNA? (A) Deoxyribose (B) Uracil (C) Adenine (D) Thymine
Description : RNA does not contain (A) Uracil (B) Adenine (C) Thymine (D) Ribose
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 : RNA does not possess (a) uracil (b) thymine (c) adenine (d) cytosine.
Last Answer : (d) cytosine
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 : Nitrosamine can deaminate (A) Cytosine to form uracil (B) Adenine to form xanthine (C) Guanine to form hypoxanthine (D) All of these
Description : The enzyme required for salvage of free purine bases is (A) Adenine phosphoribosyl transferase (B) Hypoxanthine guanine phosphoribosyl transferase (C) Both (A) and (B) (D) None of these