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

48.

There is no DNA in 

• an enucleated ovum

• mature RBCs

• a mature spermatozoan

• a mature spermatozoan

Study the pedigree chart given below.



what does it show?

• Inheritance of a sex-linked inborn error of metabolism like phenylketonuria

• Inheritance of a condition like phenylketonuria as an autosomal recessive trait

• The pedigree chart is wrong as this is not possible

• The pedigree chart is wrong as this is not possible

Which one of the following is the correct matching of three items and their grouping category?

• Items	Group
  Malleus, incus, cochlea	Ear ossicles

• Items	Group
  IIium, ischium, pubis	Coxal bones of pelvic girdle

• Items	Group
  Actin, myosin, Rhodopsin	Muscle proteins

• Items	Group
  Actin, myosin, Rhodopsin	Muscle proteins