Synapsis occurs between 

• a male and female gamete

• mRNA and ribosomes

• spindle fibres and centromere

• spindle fibres and centromere

Seminal plasma in human is rich in 

• fructose, calcium and certain enzymes

• fructose and calcium but has no enzymes

• glucose and certain enzymes but has no calcium

• glucose and certain enzymes but has no calcium

Use of antihistamines and steroids give a quick relief from

• allergy 

• nausea

• cough

• cough

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 is commonly used in the transfer of foreign DNA into crops plants?

• Trichoderma hazianum

• Meloidogyne incognita

• Agrobacterium tumefaciens

• Agrobacterium tumefaciens

Which one is the wrong pairing for the disease and its causal organism?

• Late blight of potato - Alternaria solani

• Black rust of wheat - puccinia graminis

• Loose smut of wheat - Ustilago nuda

• Loose smut of wheat - Ustilago nuda

Whose experiments cracked the DNA  and discovered unequivocally that is genetic code is a triplet?

• Nirenberg and Mathaei

• Hershey and Chase

• Morgan and Sturtevant

• Morgan and Sturtevant

Removal of introns and joining the exons in a defined order in transcription unit is called

• splicing

• tailing

• transformation

• transformation

Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

• Phytoplankton 

• Fish

• Zoonplankton

• Zoonplankton

select the incorrect statement from the following 

• Linkage is an exception to the principle of independent assortment in heredity

• galactosemia is an inborn error of metabolism

• small population size results in a random genetic drift in a population

• small population size results in a random genetic drift in a population