Biology : Biotechnology : Principles and Processes

The genetically - modified (GM) brinjal in India has been developed for 

• insect - resistance

• enhancing self- life

• enhancing mineral content

• enhancing mineral content

Restriction endonucleases are enzymes which

• make cuts at specific positions within the DNA molecule

• recognize a specific nucleotide sequence for binding of DNA ligase

• restrict the action of the enzyme DNA polymerase

• restrict the action of the enzyme DNA polymerase

Stirred -tank bioreactors have been designed for 

• the addition of preservatives of the product

• purification of the product

• ensuring anaerobic conditions in the culture vessel

• ensuring anaerobic conditions in the culture vessel

What is true about Bt toxin

• The inactive protoxin gets converted into active form in the insect gut

• Bt protein exists as active toxin in the bacillus

• The activated toxin enters the ovaries of the pets to sterilise it and thus prevent its multiplication

• The activated toxin enters the ovaries of the pets to sterilise it and thus prevent its multiplication

Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?

• GUU, GCU - Alanine

• UAG, UGA - stop

• AUG, ACG - start/ methionine

• AUG, ACG - start/ methionine

Given below is a diagrammatic cross section of a single loop of the human cochlea.

diagram

Which one of the following options correctly represents the names of three parts? 

• B: Perilymph
  C: SPerilymph
  D: Secretory Cells

• C :Endolymph
  D : Sensory hair cells
  A: Serum

• D: Sensory hair cells 
  A: Endolymph
  B: Tectorial membrane

• D: Sensory hair cells 
  A: Endolymph
  B: Tectorial membrane

Lysozyme that is present in perspiration, saliva and tears, destroys

• certain fungi

• certain types of bacteria

• all viruses

• all viruses

Restriction endonuclease

• cuts the DNA molecule randomly

• cuts the DNA molecule at specific sites

• restricts the synthesis of DNA inside the nucleus

• restricts the synthesis of DNA inside the nucleus

What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?

• The larger the fragment size, the farther it moves

• The smaller the fragment size, the farther it moves

• Positively charged fragments move to farther end

• Positively charged fragments move to farther end

During DNA replication, Okazaki fragments are used to elongate

• The leading strand towards replication fork

• The lagging strand towards replication fork

• The leading strand away from replication fork

• The leading strand away from replication fork