Genetics
Study material for unit of heredity in a living organism stretch of DNA that codes for a type of protein or for an RNA chain that has a function
Questions
Pyrimidines are comprised of
- Adenine and Guanine
- Adenine and uracil
- Thymine and Cytosine
- None
The functional gene is called
- Exon
- Cistron
- Intron
- Axon
The A/T =G/C rule was discovered by
- Chargaff
- Mendel
- Watson and Crick
- h.Khorana
The double -helix of DNA completes one turn at every
- 34 angstrom
- 3.4 angstrom
- 340 nm
- none
Single stranded RNA is found in
- Plant viruses
- Animals
- Lower plants
- Retroviruses
Double helical DNA model was proposed by
- Franklin
- Beadle and Tatum
- Watson and Crick
- Chargaff
Which of the following is not a method of gene transfer
- Micro-injection
- Shot gun
- Magic bullets
- Gene gun
Purines are comprised of
- Adenine and Guanine
- Adenine and thymine
- Cytosine and uracil
- Cytosine and thymine
Mathew, Meselson and Stahlin proved that
- DNA replicates by a semiconservative method
- DNA is a double -helical structure
- DNA is a coiled structure
- DNA ia the genetic material
The two strands of double helical DNA are
- Parallel
- Antiparallel
- T-linked
- none
In RNA the bond between Cytosine and Guanine is a
- Double bond
- Triple bond
- Single bond
- none
In DNA the bond between Adenine and Thymine is a
- Double bond
- Triple bond
- Single bond
- No bond
Single stranded DNA is found in
- Bacteria
- Animals
- Bacteriophages
- Plant viruses
In nucleosomes the prominent protein is
- Protons
- Histones
- proteoglycans
- none
A typical eukaryotic cell contains about
- 40,000 genes
- 30,000 genes
- 50,000 genes
- 70,000 genes
The technique of amplification of specific DNA sequences by in-vitro DNA synthesis is
- Transcription
- Polymerase chain reaction
- Translation
- Amplification
A technique which uses nitro cellulose for separation of NA fragments is
- Northern blotting
- Southern blotting
- Western blotting
- Eastern blotting
Nucleic acids are characterized by absorbtion at wavelength of
- 340nm
- 260nm
- 460nm
- 575nm
The nucleoside molecule consists of a
- pentose sugar and a phosphate group
- Phosphate group and nitrogenous base
- Pentose sugar and nitrogenous base
- pentose sugar, nitrogenous base and phosphate group
Self replicating ,double stranded, circular, extrachromosomal DNA molecules in bacterial cells are called
- Cosmids
- Plasmids
- mitochondrial DNA
- Recon
when a solution of isolated DNA is subjected to extreme conditions of pH and temperature, its viscosity
- Decreases
- Increases
- Remains same
- none of the above
Split genes are also known as
- Recons
- Exons
- Introns
- Cistrons
World's first mammalian clone is a
- Goat
- Sheep
- Horse
- Chicken
DNA-helix is highly organised into well-defined DNA-protein complex called
- Lysosome
- Proteosome
- Nucleosome
- Golgi complex
Which of the following cannot be used in DNA cloning
- Plasmids
- Cosmids
- Bacteriophages
- Amoeba