Past Papers of Biology 10th Class Lahore Board 2019
LAHORE BOARD 2019 10TH CLASS PAST PAPER
BIOLOGY Time Allowed: 15 Minutes
PAPER-II (Objective Type) GROUP-I Max. Marks: 12
Note: Four possible answers A, B, C and D to each question are given. The choice which you think is correct, fill that circle in front of that question with Marker or Pen ink in the answer-book. Cutting or filling two or more circles will result in zero mark in that question.1. True breeding means:
(A) Homozygous
(B) Heterozygous
(C) Karyotype
(D) Phenotype
2. Which are decomposers:
(A) Plants
(B) Animals
(C) Algae
(D) Fungi and bacteria
3. What do some bones produce:
(A) Mucous
(B) Hormones
(C) Blood cells
(D) Oxygen
4. For all ecosystems the basic source of energy is:
(A) Plants
(B) Water
(C) Sun
(D) Fire
5. Which one of the following diseases is cured by vaccines:
(A) AIDS
(B) Smallpox
(C) Cancer
(D) Malaria
6. Where does the gaseous exchange occur in human:
(A) Pharynx
(B) Trachea
(C) Bronchi
(D) Alveoli
7. Asexual reproduction in yeast take place by:
(A) Spore formation
(B) Multiple fission
(C) Binary fission
(D) Budding
8. Which organ is responsible for filtering the blood:
(A) Intestine
(B) Kidney
(C) Brain
(D) Stomach
9. The number of pairs of homologous chromosomes in human cell are:
(A) 26
(B) 25
(C) 24
(D) 23
10. Root develops from:
(A) Testa
(B) Plumule
(C) Micro Pyle
(D) Radicle
11. Number of pair of cranial nerves in human are:
(A) 10
(B) 14
(C) 12
(D) 16
12. Anti-Virus protein is:
(A) Insulin
(B) Interferon’s
(C) Thymosin
(D) Urokinase
Past Papers of Biology 10th Class Lahore Board 2019
BIOLOGY (New Scheme) Time Allowed: 1:45 hour
PAPER - II (Essay Type) GROUP -1 Max. Marks: 48
SECTION-I
2. Write short answers to any FIVE questions: (5x2 = 10)i. What are the effects of smoking on teeth?
ii. How sound is produced in voice box?
iii. What is the function of hairs and mucous in the nose?
iv. What are the causes of stone formation in kidney?
v. Define homeostasis. Give an example.
vi. What are meninges? Write down their functions.
vii. Write down the function of rods and cones present in the retina of eye.
viii. How epilepsy can be treated?
3. Write short answers to any FIVE questions: (5x2 = 10)
i. What two minerals are found in bones?
ii. Differentiate between tendons and ligaments.
iii. Define reproduction also write its importance for species.
iv. What is micropyle? What is its use for seed?
v. What is meant by alternation of generations?
vi. Differentiate between omozygous genotype and heterozygous genotype.
vii. What is meant by co-dominance?
viii. What is the theory of special creation?
4. Write short answers to any FIVE questions: (5x2 = 10)
i. What is meant by decomposers? Give an example.
ii. Write down four disadvantages of excessive DE nitrification.
iii. What is green house effect? Write the name of two important green house gases.
iv. Write down four uses of formic acid.
v. Define the term biotechnology. Also write its one benefit.
vi. Differentiate between pharmaceutical and addictive.
vii. What do you mean by narcotics? Write down its one use.
viii. What are sulpha drugs? Write down its one use.
SECTION-II
5. (a) Explain osmoregulation and thermoregulation.(b) Write down the name and explain different components of .coordinated action.
6. (a) Define arthritis and describe its types.
(b) define germination of seed. Describe various conditions necessary for seed germination.
7. (a) Give a detailed account of urbanization.
(b) Explain basic steps in genetic engineering.
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