peptide synthesis inside a cell takes place in 

• mitochondria

• chromoplast

• ribosomes 

• ribosomes 

A person with unknown blood group under ABO system has suffered much blood loss in an accident and needs an immediate blood transfusion. His one friend who has a valid certificate of his own blood type offers for blood donation without delay. What would have been the type of blood group of the donor friend?

• Type AB

• Type O

• Type A

• Type A

Mutations can be induced with

• IAA

• ethylene

• gamma radiations

• gamma radiations

Test cross in plants of in Drosophila involves crossing 

• Between two genotypes with recessive trait

• Between two F₁ hybrids

• the F₁ hybrid with a double recessive genotype

• the F₁ hybrid with a double recessive genotype

Which one of the following conditions correctly describes the manner of determining the sex in the given samples?

• XO type of sex chromosomes determine male sex in grasshopper

• XO condition in humans as found in Turner syndrome determines female sex

• Homozygous sex chromosomes (XX) produce male in Drosophila

• Homozygous sex chromosomes (XX) produce male in Drosophila