Genetic engineering has been successfully used for producing

• transgenic mice for testing safety to polio vaccine before use in humans

• transgenic models for studying new treatments for certain cardiac diseases

• transgenic cow -Rosie which produces high-fat milk for making ghee

• transgenic cow -Rosie which produces high-fat milk for making ghee

202.

Satellite DNA is useful tool in 

• Organ transplantation

• sex determination

• forensic science

• forensic science

Which one of the following does not follow the central dogma of molecular biology?

• Pea

• Mucor

• Chlamydomonas

• Chlamydomonas

Which of the following is used in gene cloning?

• Nucleoids

• Lomasomes

• Mesosomes

• Mesosomes

Which of the following is used in gene cloning?

• Nucleoids

• Lomasomes

• Mesosomes

• Mesosomes

Which one of the following is now being commercially produced by biotechnological procedures?

• Nicotine

• Morphine

• Quinine

• Quinine

In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the

• ribosomes

• nucleus

• dictyosomes

• dictyosomes

The lac operon consists of 

• four regulatory genes only

• one regulatory gene and three structural genes

• two regulatory genes and two structural genes

• two regulatory genes and two structural genes

Sickle cell anaemia is

• an autosomal-linked dominant trait

• caused by substitution of valine by glutamic acid in the β-globin chain of haemoglobin

• caused by a change in a base pair of DNA

• caused by a change in a base pair of DNA

There is no DNA in 

• an enucleated ovum

• mature RBCs

• a mature spermatozoan

• a mature spermatozoan