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
A.
Lysosomes are double membraned vesicles budded offfrom Golgi apparatus and contain digestive enzymes.
Lysosomes are roughly spherical bodies bounded by a single membrane. They are manufactured by the Golgi apparatus. Lysosomes are small membrane bound vesicles in the cytoplasm of cells which contain toxic enzymes. When a cell dies, these membranes rupture and the enzymes are released. They break down the cells structure, and the debris is removed.
In prokaryotes, the genetic material is :
linear DNA with histones
circular DNA with histones
linear DNA without histones
circular DNA without histones
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
Vesicles of Smooth Endoplasmic Reticulum (SER) are most likely on their way to :
plastids
lysosomes
nucleolus
Golgi apparatus
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.
Extranuclear inheritance is a consequence of the presence of genes in :
ER and mitochondria
lysosomes and ribosomes
ribosomes and chloroplast
mitochondria and chloroplasts
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
