Description : Which is wrong about nucleic acids? (a) DNA is single stranded in some viruses. (b) RNA is double stranded occasionally. (c) Length of one helix is 45 Å in B-DNA. (d) One turn of Z-DNA has 12 bases
Last Answer : (c) Length of one helix is 45 Å in B-DNA
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%
Description : The genine of φ×174 bacteriophage is interesting in that if contains (A) No DNA (B) DNA with uracil (C) Single stranded DNA (D) Triple standard DNA
Last Answer : Answer : C
Description : The mitochondrial DNA is (A) Like the nuclear DNA in structure (B) Single stranded, linear (C) Double stranded, circular (D) Single stranded, circular
Description : A plasmid is a (A) Single stranded linear DNA (B) Single stranded circular DNA (C) Double stranded linear DNA (D) Double stranded circular DNA
Last Answer : Answer : D
Description : Restriction endonucleases split (A) RNA (B) Single stranded DNA (C) Double stranded DNA (D) DNA-RNA hybrids
Description : Actinomycin D binds to (A) Double stranded DNA (B) Single stranded DNA (C) Single stranded RNA (D) DNA-RNA hybrid
Last Answer : Answer : A
Description : Restriction endonucleases recognize and cut a certain sequence of (A) Single stranded DNA (B) Double stranded DNA (C) RNA (D) Protein
Last Answer : Answer : B
Description : S1 nuclease hydrolyses (A) DNA of somatic cells (B) DNA of sperms (C) Any double stranded DNA (D) Any single stranded DNA
Description : Mitochondrial DNA is (A) Circular double stranded (B) Circular single stranded (C) Linear double helix (D) None of these
Last Answer : A
Description : ? X l74 has: (a) Single stranded DNA (b) Single stranded RNA (c) Double stranded RNA (d) Double stranded DNA
Last Answer : Ans. ((a))
Description : Most viruses that infect plant possess (a) single-stranded DNA (b) single-stranded RNA (c) double-stranded DNA and RNA (d) double - stranded RNA only
Last Answer : Ans:(b)
Description : AIDS virus has – (1) single-stranded RNA (2) double-stranded RNA (3) single-stranded DNA (4) double-stranded DNA
Last Answer : (1) single-stranded RNA Explanation: AIDS viruses have single stranded RNA. It is composed of two copies of positive single-stranded RNA that codes for the virus's nine genes enclosed by a ... 2,000 copies of the viral protein. The single-stranded RNA is tightly bound to nucleocapsid proteins.
Description : AIDS virus is----------- A. Single-stranded RNA (Answer) B. Single-stranded DNA C. Double-stranded RNA D. Double-stranded DNA
Last Answer : A. Single-stranded RNA (Answer)
Description : Human immuno deficiency virus (HIV) has a protein coat and a genetic material which is (a) double stranded RNA (b) double stranded DNA (c) single stranded DNA (d) single stranded RNA
Last Answer : (d) single stranded RNA.
Description : Tobacco mosaic virus (TMV) genes are (a) single stranded RNA (b) double stranded DNA (c) proteinaceous (d) double stranded RNA.
Last Answer : (a) single stranded RNA
Description : Genophore/bacterial genome or nucleoid is made of (a) histones and non-histones (b) RNA and histones (c) a single double stranded DNA (d) a single stranded DNA.
Last Answer : c) a single double stranded DNA
Description : The hereditary material present in the bacterium E.coli is (a) single-stranded DNA (b) double-stranded DNA (c) DNA (d) RNA.
Last Answer : (b) double-stranded DNA
Description : The DNA of E.coli is (a) double stranded and linear (b) double stranded and circular (c) single stranded and linear (d) single stranded and circular.
Last Answer : (b) double stranded and circular
Description : AIDS virus has : (1) single-stranded RNA (2) double-stranded RNA (3) single-stranded DNA (4) double-stranded DNA
Last Answer : single-stranded RNA
Description : If the total amount of adenine and thymine in a double stranded DNA is 45% the amount of guanine this DNA will be `:`
Last Answer : If the total amount of adenine and thymine in a double stranded DNA is 45% the amount of guanine this DNA will be ` ... ` B. `27.5%` C. `45%` D. `55%`
Description : In sticky ends produced by restriction endonucleases (A) The 2 strands of DNA are joined to each other (B) The DNA strands stick to the restriction endonuclease (C) The ends of a double stranded fragment are overlapping (D) The ends of a double stranded fragment are non overlapping
Description : All of the following statements about restriction endonucleases are true except: (A) They are present in bacteria (B) They act on double stranded DNA (C) They recognize palindromic sequences (D) They always produce sticky ends
Description : Which one of the folLowing statements is NOT true of the influenza viruses? a. They have a segmented genome. b. The genome is double-stranded DNA. c. The viruses have an envelope. d. There are three types of flu viruses
Last Answer : b. The genome is double-stranded DNA.
Description : An F-cell is unable to initiate conjugation because it lacks a. Double-Stranded DNA. b. A Prophase. c. An F Factor. d. DNA polymerase
Last Answer : c. An F Factor.
Description : n lysogeny, A- a bacteriophage transfers bacterial DNA B- bacteria take up double stranded DNA from the environment C- DNA-degrading enzymes in the extracellular medium would stop the process D- a bacteriophage genome is integrated into the bacterial genome
Last Answer : a bacteriophage genome is integrated into the bacterial genome
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 : During transcription, do both strands of DNA get transcribed into a double stranded RNA molecule?
Last Answer : No. RNA is single stranded and is transcribed from only one of the DNA strands. DNA replication does make copies of both strands.
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 : 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 : Single stranded DNA
Last Answer : Ans. Bacteriophage
Description : The eukaryotic genome differs from the prokaryotic genome because (a) the DNA is complexed with histone in prokaryotes (b) the DNA is circular and single stranded in prokaryotes (c) repetitive sequences are present in eukaryotes (d) genes in the former case are organised into operons.
Last Answer : (b) the DNA is circular and single stranded in prokaryotes
Description : are single-stranded DNA molecules that can recognize and bind to a distinctive nucLeotide sequence of a pathogen. a. Prophages b. Plasmids c. Cloning vectors d. DNA probes
Last Answer : d. DNA probes
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 : A bacterial colony containing DNA made up of 100% N15 nitrogen bases is allowed to replicate in a medium containing N14 bases. After one round of replication the result would be a) All individuals ... Only 50% individuals would be hybrids d) All individuals would have DNA made up of 100% N14
Last Answer : b) All individuals will be hybrids
Description : Can be single double or triple. Move to the net?
Last Answer : Need answer
Description : The carbon-carbon bond lengths in rank of increasing bond length is : (a) triple, double, single (b) single, double, triple (c) single, triple, double (d) triple, single, double
Last Answer : triple, double, single
Description : harrow consist of two gangs placed end to end. A) Single action disc harrow B) Double action disc harrow C) Triple action disc harrow D) None above
Last Answer : Single action disc harrow
Description : Power miller may be called a walking type tractor. A. Double axle C. Single axle B. Triple axle D. None of the above
Last Answer : Single axle
Description : You wish to purchase a dental X ray machine and have the choice between 60kVp and 70kVp machines. With single change from 60kVp to 70kVp what would the approximate affects on exposure time?CHECK A. No effect B. Half the time C. Double D. Quarter E. Triple the time
Last Answer : B. Half the time
Description : A UNIX file system has 1 KB block size and 4-byte disk addresses. What is the maximum file size if the inode contains ten direct block entries, one single indirect block entry, one double indirect block entry and one triple indirect block entry? (A) 30 GB (B) 64 GB (C) 16 GB (D) 1 GB
Last Answer : (C) 16 GB
Description : A unix file system has 1-KB blocks and 4-byte disk addresses. What is the maximum file size if i-nodes contain 10 direct entries and one single, double and triple indirect entry each? (A) 32 GB (B) 64 GB (C) 16 GB (D) 1 GB
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 : When RNA in hydrolysed there is no relationship among the quantities of four bases obtained like DNA. What does this fact indicate about structure of RNA ?
Last Answer : Ans. This indicate that RNA has a single strand structure.
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 : An RNA virus genome in the form of messenger RNA is referred to as a a. + strand RNA. b. double-stranded RNA c. – strand RNa d. Reverse strand RNA.
Last Answer : a. + strand RNA.
Description : What does the positive strand in double stranded RNA viruses stands for? A- rRNA B- tRNA C- .mRNA D- None of these
Last Answer : .mRNA
Description : The slab is said to be orthotropically reinforced , when the reinforcement is arranged in; [ A ] Single direction [ B ] Two directions at right angles with equal meshes [ C ] Two directions at right angles with unequal meshes [ D ] At the corners only
Last Answer : [ C ] Two directions at right angles with unequal meshes