1. Enzymes lower the _________ energy of a chemical reaction.
a. Potential
b. Thermal
c. Kinetic
d. Free
e. Activation
2. In Prokaryotic cells, the nuclear material is present in the:
a. Ribosomes
b. Mesosomes
c. Cytoplasm
d. Mitochondria
e. Nucleus
3. _________ is used as a raw material in the photosynthesis.
a. O2
b. H2O
c. CO
d. Glucose
4. Depletion of ozone takes place through
a. Redical reaction
b. Redical and ionic reaction
c. Ionic reaction
d. Without intermediate
5. The size of heart is nearly the size of our:_
a. Hand
b. Wrist
c. Head
d. Fist
6. Yellowish fluid in blood is called _____________.
a. Plasma
b. Platelets
c. Red blood cells
d. White blood cells
7. The air pollution turns rain water:_
a. Alkaline
b. Base
c. Acidic
d. Mineral Water
8. Plants use water to make ___________.
a. Leaves
b. Food
c. Roots
d. Oxygen
9. Which part of atom has a lot of energy?
a. Nucleus
b. Electron
c. Proton
d. Neutron
10. The removal of carbon dioxide, urine and sweat is a process of:_
a. Digestion
b. Respiration
c. Breathing
d. Excretion
11. The color of the blood is red due to the presence of:_
a. Carbon dioxide
b. Fats
c. Hemoglobin
d. Plasma
12. The first antibiotic was prepared from:_
a. Bacteria
b. Virus
c. Fungi
d. Vertebrates
13. The DNA content of a mammalian cell is about ________ % of total cell weight.
a. 0.15
b. 0.25
c. 0.35
d. 0.45
e. 0.55
14. All living and non-living make:
a. Habitats
b. Community
c. Population
d. Environment
15. Vertebrates are further divided into _________ classes.
a. Three
b. Four
c. Five
d. Six
16. Which one of the following is the cause of tuberculosis?
a. Virus
b. Bacteria
c. Fungi
d. Protozoa
17. Posterior part of embryo that gives rise to root system of young plant is:_
a. Endosperm
b. Testa
c. Epicotyl
d. Cotyledon
e. Radical
18. As compared to Amphibians, Reptiles have:_
a. Rough and Scaly skin
b. Strong and steeper bones
c. Moist and slipper skin
d. Modifies forelimbs
e. Modifies back limbs