Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?

• Lysosomes are double membraned vesicles budded offfrom Golgi apparatus and contain digestive enzymes.

• Endoplasmic reticulum consists ofa network of membranous tubules and helps in transport, synthesis and secretion

• Leucoplasts are bound by two membranes, lack pigment but contain their own DNA and protein synthesizing machinery

• Sphaerosomes are single membrane bound and are associated with synthesis and storage of lipids

Assertion: Gram-negative bacteria do not retain the stain when washed with alcohol.

Reason: The outer face of the outer membrane of Gram-negative bacteria contains lipopolysaccharides, a part of which is integrated into the membrane lipids

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : Mitochondria and chloroplasts are semi-autonomous organelles.

Reason : They are formed by division of pre-existing organelles as well as contain DNA but lack protein synthesizing machinery.

• If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion

• If both Assertion and Reason are true but the Reason is not the correct explanation of the assertion

• If Assertion is true but Reason is false

• If both Assertion and Reason are false

124.

Assertion : A cell membrane shows fluid behaviour.

Reason : A membrane is a mosaic or compositeof diverse lipids and proteins.

• If both Assertion and Reason are true and the reason is the correct explanation of the assertion

• If both Assertion and Reason are true but the reason is not the correct explanation of the assertion

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

A prokaryotic cell lacks :

• nucleus

• nuclear membrane

• membrane bound organelles

• all of the above

Extranuclear inheritance is a consequence of the presence of genes in :

• ER and mitochondria

• lysosomes and ribosomes

• ribosomes and chloroplast

• mitochondria and chloroplasts

Vesicles of Smooth Endoplasmic Reticulum (SER) are most likely on their way to :

• plastids

• lysosomes

• nucleolus

• Golgi apparatus

Lysosomes are the store house of :

• ATP

• sugar

• proteins

• hydrolytic enzymes

The genetic material of prokaryotic cell is called :

• nucleus

• nucleolus

• nucleoid

• centromere

In prokaryotes, the genetic material is :

• linear DNA with histones

• circular DNA with histones

• linear DNA without histones

• circular DNA without histones