Past Papers of Biology 10th Class Lahore Board 2017 Group II

Past Papers of  Biology 10th Class Lahore Board 2017
LAHORE BOARD 2017 10TH CLASS PAST PAPER
BIOLOGY Time Allowed: 15 Minutes
PAPER-II (Objective Type) GROUP-II Max. Marks: 12

(SECTION I)

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 Iodopsin is present in:
(A) Rods
(B) Cones
(C) Choroid
(D) Cornea

2 Saeed absorbs water through:
(A) Testa
(B) Hilum
(C) Micropyle
(D) Cornea .

3 The end of skeletal muscle attached with immoveable bone is:
(A) Origin
(B) Insertion
(C) Belly
(D) Static end

4 The outermost whorl of flower is called:
(A) Corolla
(B) Petals
(C) Calyx
(D) Androecium

5 The genotype of “O” blood group is :
(A) 1A1A
(B) 1B 1B
(C) II
(D) IBI

6 The respiratory centre is present in:
(A) Lungs
(B) Brain
(C) Nose
(D) Muscles

7 The respiratory centre is present in:
(A) Lungs
(B) Brain
(C) Nose
(D) Muscles

8 Diazepam is:
(A) Vaccine
(B) Narcotics
(C) Hallucinogens
(D) Sedative

9 Plays role in maintaining body temperature:
(A) Lungs
(B) Skin
(C) Kidneys
(D) Ear

10 Single cell protein can be obtained from:
(A) Insect
(B) Cow
(C) Algae
(D) Bird

11 Phenotypes ratio in incomplete dominance is:
(A) 1 : 3 : 3
(B) 3:1
(C) 1 : 3
(D) 1 : 2:1

12 R-2 means:
(A) Reduce
(B) Recycle
(C) Renewable
(D) Reuse

Past Papers of Biology 10th Class Lahore Board 2017
BIOLOGY (New Scheme) Time Allowed: 2:45 hour
PAPER - II (Essay Type) GROUP -II Max. Marks: 63 (PART-1)

2. Write short answers to any FIVE (5) questions: (10)
(i) What are Lenticels? Describe their function.
(ii) Differentiate between acute and chronic bronchitis.
(iii) Define osmoregulation.
(iv) What is meant by guttation?
(v) Describe any two causes of kidney failure.
(vi) What is blind spot?
(vii) Owl is unable to see during daytime. Give reason.
(viii) How ears maintain the balance of body?

3. Write short answers to any FIVE (5) questions: (10)
(i) Differentiate between compact bone and spongy bone.
(ii) What is rheumatoid arthritis?
(iii) Define oogenesis.
(iv) Give two disadvantages of vegetative propagation.
(v) Differentiate between epigeal germination and hypogeal germination.
(vi) State the law of segregation.
(vii) What is inheritance?
(viii) What are nucleosomes?

4. Write short answers to any FIVE (5) questions: (10)
(i) Define food chain and food web.
(ii) What is meant by nitrogen fixation?
(iii) What is genetic engineering?
(iv) Write any two characteristics of transgenic animals.
(v) How the microorganisms produce cell protein?
(vi) Define pharmacology.
(vii) What are hallucinogens?
(viii) Write about some drugs obtained from plants.

(SECTION-II)

Note: Attempt any TWO questions:
5. (a) Name the organs which work for homeostasis in humans. Describe in detail the
work of two organs only. 5
(b) Write a note on forebrain. 4
6. (a) What is skeletal system? Write the role of skeletal system. 5
(b) Write a note on the development and structure of seed. 4
7. (a) Write a note on carbon cycle. 5
(b) Describe the advantages of using fermenters. 4