The size of Pleuropneumonia - like Organism (PPLO) is :

1. 0.02 $\mathrm{\mu }$m

2. 1-2 $\mathrm{\mu }$m

3. 10-20 $\mathrm{\mu }$m

4. 0.1 $\mathrm{\mu }$m

Match the following columns and select the correct option :

                Column - I                                          Column - II

(a) Smooth endoplasmic reticulum              (i) Protein synthesis

(b) Rough endoplasmic reticulum                (ii) Lipid synthesis

(c) Golgi complex                                         (iii) Glycosylation

(d) Centriole                                                  (iv) Spindle formation

1. (a)-(ii), (b)-(i), (c)-(iii). (d)-(iv)

2. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)

3. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

4. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

Which one of the following cellular parts is correctly described ?
1. Centrioles - sites for active RNA synthesis
2.  Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)
3.   Lysosomes - optimally active at a pH of about 8.5
4.   Thylakoids - flattened membranous sacs forming the grana of chloroplasts

An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called -
1. Endosplasmic Reticulum
2. Plasmalemma
3. Cytoskeleton
4. Thylakoid

Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with –

    Components :
(i) Cristae of mitochondria
(ii) Inner membrane of mitochondria
(iii) Cytoplasm
(iv) Smooth endoplasmic reticulum
(v) Rough endoplasmic reticulum
(vi) Mitochondrial matrix
(vii) Cell vacuole
(viii) Nucleus
The correct components are :
       A     B     C     D
1.  (i)   (iv) (viii)  (vi)
2.  (vi)  (v)  (iv)   (vii)
3.  (v)   (i)   (iii)   (ii)
4.  (v)  (iv) (viii)  (iii)

Which one of the following is not considered as
a part of the endomembrane system ?
1. Lysosome
2. Golgi complex
3. Peroxisome
4. Vacuole

The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C) and (D). Select the part correctly matched with its function. –

1. Part (A) : Matrix – major site for
respiratory chain enzymes
2. Part (D) : Outer membrane – gives rise to
inner membrane by splitting
3. Part (B) : Inner membrane – forms
infoldings called cristae
4. Part (C) : Cristae – possess single circular
DNA molecule and ribosome

The biosynthesis of ribosomal RNA occurs in :

1. Ribosomes

2. Golgi apparatus

3. Microbodies

4. Nucleolus

Inclusion bodies of blue-green, purple, and green photosynthetic bacteria are :

1. Contractile vacuoles

2. Gas vacuoles

3. Centrioles

4. Microtubules

The cell membranes are mainly composed of:-

(1) Phospholipids

(2) Proteins

(3) Fats

(4) Carbohydrates