Explore topic-wise MCQs in Science.

This section includes 26 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.

1.

Which one of the following cell organelles plays the most important role in the synthesis of proteins?

A. Ribosomes  
B. Plastids
C.  sedimentation.
D. Vacuoles
E. None of these
Answer» B. Plastids
Discussion
2.

Which one of the following statements is correct? Statement 1: Plant cells are smaller than animal cells. Statement 2: Plant cells are larger than animal cells.

A. Statement 1
B. Statement 2
C.     Hydrosphere.
D. Both statements are incorrect
E. None of these
Answer» C.     Hydrosphere.
Discussion
3.

Which one of the following statements is correct? Statement 1: The cell is the basic, structural and functional unit of living organisms. Statement 2: The tissue is the basic, structural and functional unit of living organisms.

A. Statement 1
B. Statement 2
C.  Faster in dish Q
D. Both statements are incorrect.
E. None of these
Answer» B. Statement 2
Discussion
4.

An example of osmosis is:

A. Diffusion of oxygen in the lungs from the alveolar air space.
B. Absorption of water through roots from the soil.
C.  during the night time.
D. All the above
E. None of these
Answer» C.  during the night time.
Discussion
5.

Which one of the following divides by binary fission?

A. Cyanobacteria   
B. Human being
C.  the direction of sea breeze.
D. Hydra
E. None of these
Answer» B. Human being
Discussion
6.

Which of the following is one of the two regions of a chloroplast?

A. Leucoplast  
B. Lysosome
C.  movement of water.
D. Chlorophyll
E. None of these
Answer» D. Chlorophyll
Discussion
7.

Which tissue lacks blood vessels?

A. Epithelial tissue
B. Connective tissue
C.  the direction of sea breeze.
D. Cardiac muscle tissue
E. None of these
Answer» B. Connective tissue
Discussion
8.

Plasmolysis leads to:

A. Swelling up of cell.
B. Shrinkage of cell.
C.  Air has no mass.
D. Either [a] or [b]
E. None of these
Answer» C.  Air has no mass.
Discussion
9.

____cells have well-developed air spaces and are known as aerenchyma.

A. Collenchyma 
B. Sclerenchyma
C.  nitrogen.
D. Mesistematic
E. None of these
Answer» D. Mesistematic
Discussion
10.

In an isotonic solution:

A. Water molecules move from inside to outside the cell through a semi-permeable membrane.
B. No movement of water molecules across the cell membrane occurs.
C.     The pressure exerted by air outside is much more.
D. Either [a] or [c]
E. None of these
Answer» C.     The pressure exerted by air outside is much more.
Discussion
11.

Which one of the following tissues is specialised to connect and anchor various body organs?

A. Epithelial tissue  
B. Muscular tissue
C.  nitrogen.
D. Nervous tissue
E. None of these
Answer» D. Nervous tissue
Discussion
12.

Which one of the following is a kind of animal tissue?

A. Epithelial tissue  
B. Muscular tissue
C.  Evaporation is slow in sunlight
D. All the above
E. None of these
Answer» E. None of these
Discussion
13.

Which of the following tissues is present in the growing portion of plant?

A. Meristematic
B. Parenchyma
C.  Hydrometer    
D. Sclerenchyma
E. None of these
Answer» B. Parenchyma
Discussion
14.

Which of the following is a type of plant tissue?

A. Epithelial
B. Apical
C.  (i), and (ii)
D. Connective
E. None of these
Answer» C.  (i), and (ii)
Discussion
15.

Which of the following is true about tendons?

A. They are inelastic.
B. They are elastic.
C.  Ionosphere     
D. They are made up of white, as well as yellow fibres.
E. None of these
Answer» B. They are elastic.
Discussion
16.

Which of the following is true about animal cell?

A. Animal cells are generally smaller in size as compared to plant cells.
B. Cell wall is absent.
C.  1-cool, 2-heat, 3-heat, 4-heat
D. Both [a] and [b]
E. None of these
Answer» E. None of these
Discussion
17.

Which of the following is a part of cell?

A. Tissue   
B. Organ
C. melting   
D. Osmosis
E. None of these
Answer» D. Osmosis
Discussion
18.

Which cell organelles are present in both animal and plant cells?

A.  Cell wall, chromosomes, cytoplasm, chloroplasts.
B.  Cell membrane, chromosomes, cytoplasm, mitochondria.  
C.  Float at higher level  
D.  Cytoplasm, mitochondria, cell wall, chromosomes.
Answer» C.  Float at higher level  
Discussion
19.

Identify \[P,\,\,Q\] and \[R\] from the information given below.

A. P Q R Nucleus Cell wall Cytoplasm
B. P Q R Cell wall Cytoplasm Nucleus
C.  Attractive force between card board and glass
D. P Q R Cytoplasm Cell wall Nucleus  
Answer» E.
Discussion
20.

Identify the statement that is not true.

A.  Cytoplasm contains jelly-like substance.
B.  Nucleus makes food for the plant.  
C.  Piston pressure  
D.  Cytoplasm is the site where many cell activities take place.
Answer» C.  Piston pressure  
Discussion
21.

Which organelle is composed of cristae and a matrix?

A.  Chloroplast    
B.  Nucleolus
C. gaseous
D.  Central vacuole
Answer» D.  Central vacuole
Discussion
22.

Identify the function of Golgi-complex

A.  It helps in photosynthesis.
B.  It helps in secretion.  
C.  Both a and b 
D.  It helps in protein synthesis.
Answer» C.  Both a and b 
Discussion
23.

Plant cells contain a cell wall. Which substance is present in the cell wall?

A.  Protein  
B.  Carbohydrate
C.  (ii) and (iii)
D.  Cellulose  
Answer» E.
Discussion
24.

Cells are of different shapes and sizes. Some cells are irregular in shape such as

A.  Amoeba   
B.  Red blood cell
C.  Water cycle maintenance  
D.  Both (A) and (C)
Answer» E.
Discussion
25.

Study the given figure carefully. In which direction the net movement of water will take place?

A.  From solution 1 to solution 2
B.  From solution 2 to solution 1
C. evaporation 
D.  No movement will take place
Answer» B.  From solution 2 to solution 1
Discussion
26.

A unicellular protist X, which has contractile vacuole to remove excess intracellular water, was placed in salt solution of increasing osmolarity. The given graph shows the rate of contraction of vacuole to pump out excess water against osmolarity of solution.Select the option that gives the correct explanation of the data.  

A. In an isotonic solution there is no diffusion of water in or out of the X, so the contraction rate is zero.
B. At higher osmolarity, more salt diffuses into X, therefore lower rates of contractions are required.
C.  Remain Unchanged
D. The contractile vacuole is less efficient in solution of high osmolarity because of reduced respiration and less production of ATP.
Answer» D. The contractile vacuole is less efficient in solution of high osmolarity because of reduced respiration and less production of ATP.
Discussion