1 Marks Questions
Question 1 : The antibiotic penicillin is obtained from
i) protozoan
ii) bacteria
iii) virus
iv) fungus
Answer : iv) fungus
Question 2 : Expand the biological abbreviation given below:
DPT
Answer : Diphtheria Pertussis Tetanus is the full form of DPT.
Question 3 : Differentiate between the disinfectant and antiseptic (definition).
Answer :
| Antiseptic | Disinfectant |
|
|
Question 4 : Give one example of an antibiotic.
Answer : Penicillin is an example of an antibiotic.
Question 5 : Define the term innate immunity.
Answer : Innate immunity is the type of immunity inherited by an organism from parents since birth. It is also called as natural or inborn immunity.
Question 6 : Give the biological/technical term for the chemical found in blood which act against antigens.
Answer : Antibody is the chemical found in blood which acts against antigens.
Question 7 : Briefly explain the term disinfectants.
Answer : These are strong chemical substances applied to non-living objects to destroy microorganisms living on it. As disinfectants are strong in nature, they are harmful for human skin and should be used carefully, e.g. lime, lysol, phenol, formalin (40%), bordeaux mixture, DDT etc.
Question 8 : Name the chemical substances produced by microorganisms that can kill or inhibit the growth of other microorganisms.
Answer : Antibiotics.
Question 9 : Choose the correct answer from the four options given below each statement.
BCG vaccine is used to build immunity against.
a) poliomyelitis
b) tuberculosis
c) malaria
d) whooping cough
Answer : BCG vaccine is used to build immunity against (b) tuberculosis.
Question 10 : Give the biological/technical term for the artificially introducing weakened germs or germ substance into the body for developing resistance to a particular disease.
Answer : Vaccination is the technical/biological term for artificially introducing weakened germs or germ substances into the body for developing resistance against a particular disease.
Question 11 : Given below is the set of five terms rewrite the terms in logical sequence as directed at the end of each statement.
Active immunity, antigen, antibody, bacteria, lymphocytes (defense mechanism of the body).
Answer : Logical sequence is active immunity, bacteria, antigen, lymphocyte, antibody.
Question 12 : Answer the following questions as directed.
State whether the following statement is true or false. If false, rewrite the correct form of the statement by changing the first or last word only.
Penicillin obtained from Penicillium notatum is an antibody.
Answer : The statement is false. Penicillin obtained from Penicillium notatum is an antibiotic.
Question 13 : Rewrite and complete the following sentences by inserting the correct word in the space indicated.
…………………… vaccine is given to build up immunity against polio.
Answer : Salk’s vaccine is given to build up immunity against polio.
Question 14 : Name the foreign body that induces the formation of antibodies in the body.
Answer : Antigen is the foreign body that induces the formation of antibodies in the body.
Question 15 : Identify the odd one from the group and name the category to which remaining belong.
Cresol, DDT, lime, mercurochrome, bordeaux mixture.
Answer : Odd one : Mercurochrome.
Category : All other disinfectants.
Question 16 : Silk’s vaccine is used to build immunity against
a) tuberculosis
b) polio myelitis
c) malaria
Answer : b) Salk’s vaccine is used to build immunity against poliomyelitis.
Question 17 : Explain the term vaccination.
Answer : Vaccination is the technical/biological term for artificially introducing weakened germs or germ substances into the body for developing resistance against a particular disease.
Question 18 : Give the biological/technical term for the extracts of toxins secreted by bacteria.
Answer : Antitoxin is the biological/technical term used for the extracts of toxins secreted by bacteria.
Question 19 : State whether the following statement is true or false. If false, write the correct form of the statement by changing the first or last word only.
Chemicals applied to spots and places to kill harmful microorganisms are called disinfectants.
Answer : The statement is true.
Question 20 : Identify and name the following process/term from the statement given below:
Mild chemical applied on the skin to kill germs.
Answer : Antiseptic is the mild chemical applied on the skin to kill germs.
Question 21 : Explain the term antibiotics.
Answer : These are chemical substances secreted by microorganisms. These are used against other pathogens in order to kill or prevent their growth inside the body, e.g., penicillin.
Question 22 : Give the biological term for the process by which white blood cells engulf harmful microbes.
Answer : Phagocytosis is the process by which white blood cells engulf harmful microbes.
Question 23 : Distinguish between the following on the basis of what is given in bracket DPT and BCG (expanded form of the vaccine).
Answer : DPT : Diphtheria Pertussis and Tetanus.
BCG : Bacillus Calmette-Guerin.
Question 24 : Name any two microbes that causes diseases in man. In each case give an example of a disease caused by them.
Answer : Two microbes that cause disease in man are bacteria (causes TB), virus (causes AIDS).
Question 25 : Name any two vaccines and mention the diseases against which they give immunity.
Answer : Two vaccines are
DPT : Against Diphtheria Pertussis and Tetanus.
BCG : Bacillus Calmette-Guerin (Given for tuberculosis).
Question 26 : Expand AIDS.
Answer : The full form of AIDS is Acquired Immune Deficiency Syndrome.
Biology Questions and Answers ICSE Class 10 :
Cell Cycle and Cell Division | Genetics | Absorption by Roots| Transpiration | Photosynthesis | Circulatory System | Excretory System | Nervous System | Endocrine System | Reproductive System | Population and Its Control | AIDS to Health and Health Organisation | Pollution