THE LIVING WORLD ( NEET-BIOLOGY PRACTICE QUESTIONS)

 

1. Which of the following are characteristics of living things

A)            They reproduce

B)            They acquire energy

C)            They respond to stimuli

D)            All of the above

  Correct Answer: D

2. Organisms which display properties of both living and nonliving                          A)            Viruses                                     
B)            Diatoms

C)            Lichens

D)            Bacteria

Correct Answer: A

3. The highest level of organization among the following is

A)            Ecosystems

B)            Iandscapes

C)            Populations

D)            communities

Correct Answer: B

4. The lowest level of organization among the following is

A)            Populations

B)            Landscapes

C)            Ecosystems

D)            Communities

Correct Answer: A

5. The smallest unit of an element that retains all the properties of the element is       

A)            Atom

B)            Molecule

C)            Electron

D)            Compound

Correct Answer: A

6. In atoms, protons and neutrons are present

A)            Outside the nucleus                

B)            Only in the nucleus

C)            In the electron shells

D)            Inside and outside nucleus

Correct Answer: B

7. Which of these particles determine the chemical properties of an atom        

A)            Protons

B)            Neutrons

C)            Electrons

D)            None of these

Correct Answer: C

8. Which of the following substances does not play a role in normal human physiology

A)            Calcium

B)            Silver

C)            Phosphorus

D)            Sulphur

Correct Answer: B

9. The ionization of a sodium atom to produce 

Na+
 is an example of         

A)            Oxidation

B)            Reduction

C)            Catabolism

D)            Anabolism

Correct Answer: A

10. Which of the following is a trace element required only in small amounts by most living things

A)            Oxygen

B)            Iron

C)            Nitrogen

D)            Hydrogen

Correct Answer: B

11. Your body contains the smallest amount of which of the following

A)            Carbon

B)            Nitrogen

C)            Oxygen

D)            Phosphorus

Correct Answer: D

12.  Role of molybdenum is                   

A)            Nitrogen fixation

B)            Carbon assimilation

C)            Flowering induction

D)            Chromosome contraction

Correct Answer: A

13. Atoms combine in chemical reactions to form

A)            Elements

B)            Energy

C)            Compounds

D)            Specific heat

Correct Answer: C

14.  Atoms share electrons unequally in a/an......bond                             

A)            Ionic

B)            Hydrogen

C)            Non polar covalent

D)            Polar covalent

Correct Answer: D

15.  Maximum energy is required to break     

A)            Ionic bonds

B)            Covalent bonds

C)            Hydrogen bonds                     

D)            Vander Waals

Correct Answer: B

16.  What type of energy is present in a covalent bond                            

A)            Heat energy

B)            Light energy

C)            Potential energy

D)            Kinetic energy

Correct Answer: C

17. Where are hydrogen bonds important to life

A)            In ionic substance

B)            Between water molecules

C)            Between hydrogen atoms

D)            All of the above

Correct Answer: B

18.  A solution that resists changes in pH is a/an                                       

A)            Buffer

B)            Catalyst

C)            Reducing agent

D)            Oxidizing agent

Correct Answer: A

19.  Of the following choices, the pH of the least acidic solution is          

A)            6.0

B)            4.5

C)            2.3

D)            1.0

Correct Answer: A

20.  The most abundant compound in living cells is                                 

A)            Carbon

B)            Water

C)            Hydrogen

D)            Oxygen

Correct Answer: B

21.  A water molecule shows                    

A)            Polarity

B)            Solvency

C)            Heat resistance

D)            All of these

Correct Answer: D

22.  Hydrolysis is a...............reaction

A)            Cleavage

B)            Electron transfer

C)            Condensation

D)            Rearrangement

Correct Answer: A

23.  The smallest particle of water is                

A)            An atom

B)            A crystal

C)            A molecule

D)            An element

Correct Answer: C

24. The most immediate source of energy  for living cells is generally in the form of         

A)            Lipids

B)            Proteins

C)            Vitamins

D)            Carbohydrates

Correct Answer: D

25.  Which one is hexose sugar                                         

A)            Mannose

B)            Galactose

C)            Both  and

D)            Cellulose

Correct Answer: C


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