Paper 1994
. Which of the following statements are true and which are false.
a) Bacteria are parasites(t)

b) Ruby is an Oxide of Aluminum(t)

c) In the Australian continent, days are longer than nights in June.(f)

In the Australian continent,nights are longer than days in June


Gypsum is hydrated calcium carbonate chemically.(f)

Gypsum is hydrated calcium Sulphate chemically


e) Twenty-three moons revolve around Saturn(f)

nine moons revolve around Saturn

f) Pluto is the coldest planet(t- provided if u consider pluto a planet)

g) Chromite ore contains chromium oxide(t)
Chromite ore contains oxide of chromium and iron

h) Mica is a nonconductor of electricity.(t)
Mica:aluminosilicate mineral

i) Sun is the biggest star in the universe.(f)

j) The earth completes one rotation about its axis in 365.25 days.(T)

AS we all know about leap year that comes after 4 years.

4. Fill in the blanks
(i) The capacity to do work is called _________.(energy)

(ii) The energy possessed by a body due to its position is called _________.(potential energy)

(iii) Kitab al-Manazir is a publication by a famous Muslim scientist about _________.(optics)
(iv) _________ usually lies in the centre of an animal cell.(nucleus)

(v) Calcium and _________ are the essential elements of bones.(phosphorus)

(vi) Proteins are formed by combination of _________.(amino acids)

(vii) Rainwater dissolves sulphur dioxide to form _________(sulphuric acid)

(viii) The set of instructions given to a computer is called _________.(Command)

(ix) Chemicals such as penicillin which act on _________ are called antibiotics.
Bacteria

(x) Comet Shoemaker Levy 9 hit the planet _________ in July this year(collision took place in july 1994) Mars( plz confirm this )

7. Give brief answers for any five of the following

(i) Name the two proteins found in milk.(albumin, globulin and casein)

@farooq_basir

Lectin: a plant protein: a protein found mainly in seeds and grains and their products, belonging to a group that binds to carbohydrates and causes blood cells to clump together.


(ii) What organ of human body controls the amount of water and salt in blood?(kidneys)

(iii) Drugs are classified into five major groups. Define any two.

Antibiotics
Antiparasitic
Antiviral
Antiprotozoal
Hormonal

(iv) How do chromosomes in a male and female differ in a human body.

male XY
Female:XX



(v) Which two gases do you exhale more than you inhale?

(carbon dioxide and oxygen)

(vi) Name any two glands which secretes hormones in human body(thyroid and PIYUITARY, Pancreas)

Regards
Rana Atif