General
✓✗Pili of bacteria are
- pigment-containing vesicles in the cytoplasm
- elongated tubular structures made of a special protein
- infoldings of the plasma membrane into the cell
- the main organs of locomotion in bacteria
General
✓✗Mesosomes occur in the form of
- stacks of flattened sacs called grana
- vesicles, tubules and lamellae
- single spherical granules of glycogen
- cristae within a matrix
General
✓✗During different stages of cell division, cells show structured chromosomes in place of the
- nucleus
- mitochondria
- Golgi apparatus
- cell wall
General
✓✗Proteins synthesised by ribosomes on the ER are modified in the Golgi cisternae and then released from its
- cis face
- nuclear side
- outer membrane
- trans face
General
✓✗The rough ER is extensive and continuous with the
- cell wall
- thylakoid membrane
- inner mitochondrial membrane
- outer membrane of the nucleus
General
✓✗In the membrane of human red blood cells, the approximate composition is
- 40 per cent protein and 52 per cent lipids
- 52 per cent protein and 40 per cent lipids
- 75 per cent carbohydrate and 25 per cent lipids
- 90 per cent lipids and 10 per cent protein
General
✓✗The fluid mosaic model of the cell membrane was proposed in
- 1855
- 1838
- 1953
- 1972
General
✓✗The important site for formation of glycoproteins and glycolipids is the
- lysosome
- plastid
- Golgi apparatus
- vacuole
General
✓✗Which of the following is the correct pair of subunits for the given ribosome?
- 80S - 60S and 40S; 70S - 50S and 30S
- 80S - 70S and 10S; 70S - 40S and 30S
- 80S - 40S and 40S; 70S - 35S and 35S
- 80S - 50S and 30S; 70S - 60S and 40S
General
✓✗Match List I with List II.
Choose the correct answer from the options given below.
| List I | List II |
| P. Perinuclear space | (i) Site of active rRNA synthesis |
| Q. Nuclear pores | (ii) DNA, histones, non-histone proteins and RNA |
| R. Nucleolus | (iii) Space of 10-50 nm between the two membranes |
| S. Chromatin | (iv) Passage of RNA and proteins in both directions |
- P-(iii), Q-(iv), R-(i), S-(ii)
- P-(iv), Q-(iii), R-(i), S-(ii)
- P-(i), Q-(iv), R-(iii), S-(ii)
- P-(iii), Q-(iv), R-(ii), S-(i)
General
✓✗In which of the following cell compartments would you expect to find 70S ribosomes in a eukaryotic plant cell?
A. Cytoplasm
B. Mitochondrial matrix
C. Chloroplast stroma
D. Surface of rough ER
E. Nucleolus
Choose the correct answer from the options given below.
A. Cytoplasm
B. Mitochondrial matrix
C. Chloroplast stroma
D. Surface of rough ER
E. Nucleolus
Choose the correct answer from the options given below.
- C, D and E only
- A and D only
- B and C only
- A, B and C only
General
✓✗In prokaryotes, the genetic material is
- enclosed by a double nuclear membrane
- present only in the plasmids
- packed into many linear chromosomes
- basically naked and not enveloped by a nuclear membrane
General
✓✗In active transport, ions or molecules are transported
- only in the form of water
- from higher to lower concentration, without energy
- only by simple diffusion
- from lower to higher concentration, using energy
General
✓✗Which type of leucoplast stores starch, as in potato?
- Aleuroplast
- Elaioplast
- Amyloplast
- Chromoplast
General
✓✗Match List-I with List-II.
Choose the correct answer from the options given below.
| List-I | List-II |
| P. Nucleolus | (i) Site of formation of glycolipids |
| Q. Centriole | (ii) Organisation like a cartwheel |
| R. Leucoplasts | (iii) Site for active ribosomal RNA synthesis |
| S. Golgi apparatus | (iv) Storing nutrients |
- P-(i), Q-(ii), R-(iii), S-(iv)
- P-(ii), Q-(iii), R-(i), S-(iv)
- P-(iii), Q-(ii), R-(iv), S-(i)
- P-(iii), Q-(iv), R-(ii), S-(i)