Answers posted by suganyadevi.p

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We can avoid the insertion of undersirable gene by

answered Dec 2, 2016

Ans: (D) cloning and gene transfer

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____ is important for the terrmination of translation

answered Dec 2, 2016

Ans: (C) binding of release factor to stop codon

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splicing is a process where

answered Dec 2, 2016

Ans: ( c ) introns are removed and exons are joined in defined order

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which of the following is true: a. inheritance of a character is regulated by both promoter and regulatory sequences b.regulatory genes always code for a protein in order to control gene expression c. introns are present only in eukaryotes d.DNA sequence coding for tRNA or rRNA may not be necessarily called a gene

answered Dec 2, 2016

Ans: (B) a, b and c

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if transcription involved both the strands of DNA

answered Dec 2, 2016

Ans: (D) All the above

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The implication of the discoveries by Gregor Mendel, W alter Sutton, Thomas Hunt Morgan

answered Dec 2, 2016

Ans: (D) the chromosomes was localised by nucleus

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the transformed live R bacteria

answered Dec 2, 2016

Ans: (A) was virulent and synthesised the smooth coat

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The coat of the virulent bacteria is made up of

answered Dec 2, 2016

Ans: (A) polysaccharides

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The S strain is___ and is because of ____

answered Dec 2, 2016

Ans: (A) virulent, presence of coat

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higher order of chromatin packing requires

answered Dec 2, 2016

Ans: (D) non-histone chromosomal proteins

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nucleosomes can be visualised under

answered Dec 2, 2016

Ans: (A) electron microscope

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histones are organised as

answered Dec 2, 2016

Ans: (C) octamers

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the protein bound to DNA must be

answered Dec 2, 2016

Ans: (A) positively charged

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in the prokaryotes the DNA is

answered Dec 2, 2016

Ans: (B) confined within the nucleoid

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the rise per base pair of the DNA is

answered Dec 2, 2016

Ans: (C) 0.34 nM

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the distance between the 2 strands of the DNA are maintained because

answered Dec 2, 2016

Ans: (C) always purines come opposite to pyramidines

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Chargaff rule is

answered Dec 2, 2016

Ans: (B) A:T= G:CChargaff rule states that ratios between Adenine and Thymine and Guanine and Cytosi...

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____ produced the X-ray diffraction data for DNA double helix

answered Dec 2, 2016

Ans: (D) Maurice Wilkins and Rosalind Franklin

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DNA in the nucleus was identified by

answered Dec 2, 2016

Ans: (D) Friedrich Meischer

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The functions of RNA are: a. genetic material b. adapter molecules c. catalysts d. messenger

answered Dec 2, 2016

Ans: (D) all the above

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DNA---->RNA is called

answered Dec 2, 2016

Ans: (D) Transcription

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the newly synthesised discontinuous fragments of DNa are acted upon by

answered Dec 2, 2016

Ans: (D) DNA ligase

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the average rate of replication is

answered Dec 2, 2016

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In the experimental proof of the replication model of DNA, the medium contained

answered Dec 2, 2016

Ans: (D) ammonium chlorideMeselson and stahl performed the following experimental proof for DNA repl...

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RNA acts as

answered Dec 2, 2016

Ans: (D) genetic material and catalystRNA acts as genetic material in soe viruses and ribozymes are ...

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__ was the first genetic material

answered Dec 2, 2016

Ans: (B) RNA

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in the experiment by the Hershey and Chase, the steps in order are

answered Dec 2, 2016

Ans: (D) infection -> blending -> centrifugation

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A molecule that must be a genetic material must

answered Dec 2, 2016

Ans: (D) All the aboveCriteria for a molecule to act as a genetic material.* Should be able to gener...

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Hershey and Chase carried out experiments with

answered Dec 2, 2016

Ans: (B) Bacteriophage

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the ultimate proof of DNA as the genetic material was substantiated by the work of

answered Dec 2, 2016

Ans: (D) Alfred Hershey and Martha ChaseThey grew some virus that contained radioactive phosporus an...

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In Avery McLeod and Maclyn McCarty's experiment, __ alone inhibited transformation

answered Dec 2, 2016

Ans: (D) DNAseThey worked on pneumo coccus strains. The purification procedure Avery undertook consi...

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Prior to the work of Oswald Avery, Colin MacLeod and Maclyn McCarty, the genetic material was thought to be

answered Dec 2, 2016

Ans: (A) Protein

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the results of griffiths experiments showed

answered Dec 2, 2016

Ans: (C) transformation of genetic material

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Griffith's experiments were carried out in

answered Dec 2, 2016

Ans: (A) Streptococcus pneumoniae

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__ is transcriptionally active chromatin

answered Dec 2, 2016

Ans: (D) euchromatin

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Densely packed and stains dark is called

answered Dec 2, 2016

Ans: (B) heterochromatinThe Chromatin that is more densely packed and stain dark are called heteroch...

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Region of chromatin are loosely packed and stains light

answered Dec 2, 2016

Ans: (A) euchromatinIn a typical nucleus, some region of chromatin are loosely packed and stains lig...

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thread-like colored bodies seen in nucleus are called

answered Dec 2, 2016

Ans: (C) Chromosomes

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Nucleosome contains____ of DNA helix

answered Dec 2, 2016

Ans: (C) 200 bpIn eukaryotes, there is a set of positively charged, basic proteins called histones. ...

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DNA wrapped around histone octomers is called

answered Dec 2, 2016

Ans: (B) nucleosome

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Each turn of B-DNA has _____ bp

answered Dec 2, 2016

Ans: (B) 10

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The number of hydrogen between guanine and adenine

answered Dec 2, 2016

Ans: (A) 0Guanine does not form a base pair with Adenine

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The number of hydrogen between guanine and cytosine

answered Nov 30, 2016

Ans: (A) 3Two hydrogen bonds are present between Adenine and Thymine (A = T) and three hydrogen bond...

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5-methyl uracil is

answered Nov 30, 2016

Ans: (D) Thymine

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The backbone of DNA has

answered Nov 30, 2016

Ans: (A) sugar and phosphate

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___ is common in both DNA and RNA while __ occurs only in RNA

answered Nov 30, 2016

Ans: (B) cytosine and uracil

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__ and __ are purines

answered Nov 30, 2016

Ans: (C) adenine and guanine

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unit of length of DNA is

answered Nov 30, 2016

Ans: (B) Base pairs

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the hereditary variations in Drosophile can be observed with

answered Nov 30, 2016

Ans: (B) low power microscopes

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the lie cycle of Drosophila is

answered Nov 30, 2016

Ans: (D) 2 weeks

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