Cell - Structure And Functions
Cell - Structure And Functions
Questions
Which of the following are double membrane bounded cell organelles?
- Golgi complex, Vacuole, Nucleus
- Centriole, Vacuole, Chloroplast
- Nucleus, Mitochondria, Chloroplast
- Centrosome, Centriole, Nucleolus
- Mitochondria, Centrosome, Golgi complex
Which of the following pairs of ‘cell organelle and discoverer’ is not correct?
- Ribosome – Palade
- Lysosome – Duve
- Centrosome – Boveri
- Nucleolus – Robert Brown
- Golgi apparatus – Camillo Golgi
Which polysaccharide is the major constituent of fungal cell wall?
- Lignin
- Cellulose
- Pectin
- Chitin
- Hemicellulose
Golgi bodies are often called
- dictyosomes
- cisternae
- matrix
- cristae
The in-foldings of the inner mitochondrial membrane are called
- cristae
- oxysomes
- grana
- cisterns
Which of the following statements are correct about cell wall?
a. It is made of a complex carbohydrate called cellulose.
b. It is found in both plant and animal cells.
c. It is semi-permeable.
d. It is hard and rigid.
- Only a and b
- Only a and c
- Only a and d
- All a, b, c and d
- None of these
The thread-like structures present in the nucleus are collectively called
- nucleolus
- genes
- chromatin
- ribosomes
Grana are a part of
- mitochondria
- chloroplasts
- aleurone grains
- starch grains
Which of the following statements is incorrect?
- Functional segments of DNA are called genes.
- Chromatin material is organised to form chromosomes during cell division.
- Chromosomes are composed of DNA and proteins.
- Organisms lacking nuclear membrane are called eukaryotes.
In plants, carbohydrates are stored in the form of starch. Which of the following organelles help in the storage of starch?
- Vacuoles
- Cytosols
- Cisterns
- Centrosomes
Which of the following options correctly defines "Tonoplast"?
- The outer covering of a vacuole
- The inner folds of mitochondria
- The inner covering of lysosomes
- The outer covering of golgi apparatus
Animal sperms possess acrosome that helps it to enter into the ovum. Which of the following cell organelles synthesises acrosome of a sperm?
- Mitochondrion
- Golgi apparatus
- Endoplasmic reticulum
- Vacuole
Which of the following organelles serve(s) as a channel for the transport of materials?
- Ribosomes
- Lysosomes
- Mitochondria
- Endoplasmic reticulum
The dark spot-like structure inside the nucleus of a cell that helps in making ribosomes is called
- nucleoplasm
- nucleoid
- nucleoside
- nucleolus
The shape of the chromosome is determined by
- centromere
- telomere
- centrosphere
- chromomere
Which of the following cell structures is/are associated with oxidative phosphorylation?
- Grana
- Oxisomes
- Ribosomes
- Endoplasmic reticulum
The 'fluid mosaic' model of cell membrane states that
- a lipid bilayer has proteins embedded in itself and none on the surface
- a lipid bilayer has some embedded proteins and some proteins on the surface
- a lipid bilayer is coated by a layer of proteins on each face
- a lipid bilayer is coated by a layer of proteins on the outer face only
Which of the following statements is/are correct?
(a) The cytoplasm supports and protects the cell organelles that perform different metabolic functions.
(b) The Golgi apparatus consists of stacks of flattened membrane-bound sacs or vesicles, these stacks are called cristae.
(c) Animal cells are small, have no cell wall, and have small vacuoles.
- only a
- only b
- only c
- both a and c
- a, b and c
Which of the following statements is/are correct?
a. Chromoplasts are coloured plastids.
b. Leucoplasts are colourless plastids.
c. Leucoplasts are involved in the formation and storage of starch and oil drops.
- Only c
- Only a and b
- All a, b and c
- Only a
- Only b
Match the following.
| Column - I | Column - II |
| P. Mitochondria | 1. Site for protein synthesis |
| Q. Ribosomes | 2. Powerhouse of cell |
| R. Chloroplasts | 3. Suicidal bags of cell |
| S. Lysosomes | 4. Site for photosynthesis |
- P - 1, Q - 2, R - 3, S - 4
- P - 2, Q - 3, R - 1, S - 4
- P - 2, Q - 1, R - 4, S - 3
- P - 3, Q - 2, R - 4, S - 1
- P - 3, Q - 1, R - 4, S - 2
Which enzymes are carried by lysosomes?
- Endolytic
- Exolytic
- Hydrolases
- Hydrolytic
Consider the following pairs of organisms:
(i) Moss and sponge
(ii) Bacteria and blue-green algae
(iii) Yeast and amoeba
(iv) Penicillium and spirogyra
Which of these pairs belong(s) to the group 'prokaryotes'?
- Only (i)
- Both (i) and (ii)
- Both (ii) and (iii)
- Only (ii)
Which of the following options is the correct match of the type of cell and cell structure present in it?
- Animal cell - plastids
- Plant cell - mitochondria
- Animal cell - cell wall
- Plant cell - centrosome
Which of the following statements is false about the discovery of cell?
- Cell was discovered by Mendel.
- Cell was discovered in 1665.
- It was discovered under a simple magnifying device.
- The discovered cells were dead cells.