Fill in the blanks.

(i) Insulin is produced in the human body by the ___________. (Liver, Pancreas, Gallbladder)
(ii) In an animal cell protein is synthesized in the ___________. (Nucleus, Mitochondria, Ribosome)
(iii) Chemically finger nails are made up of ___________. (Carbohydrate, Protein, Minerals)
(iv) Muscle stiffness is a symptom caused by the disease ___________ (Polio, Tetanus, Rabies)
(v) Animals which obtain their food from dead organisms are called ___________. (Carnivores, Scavengers, Saprophytes)
(vi) ___________ is not affected by cooking. (Ascorbic acid, Thiamin, Riboflavin)
(vii) Rickets is caused by the deficiency of vitamin ___________. (A, D, K)
(viii) The number of chromosomes in the spermatozoa is ___________ (Twenty-two, twenty-three, Forty-six.
(ix) The fat in our food is digested by the enzymes ___________. (lipase, lactase, trypsin)
m(x) The ost abundant element in the human body is ___________. (Carbon, Hydrogen,Oxygen)

14. Which of the following statements are false and which are true.

(i) Sound is a form of energy T
(ii) A fraction of sunlight is refracted as it enters the earth’s atmosphere.T

(iii) The energy possessed by a water fall is kinetic energy.

(iv) Rainbows are produced by the reflection of light through raindrops.T

(v) Light switches in our homes are connected in parallel series.T

(vi) Generators convert mechanical energy into electricity.T

(vii) Modern incandescent bulbs contain filaments made of copper.

(viii) A steam engine cannot be powered by fossil fuels. F

(ix) Nuclear energy is a cheap source of abundant electricity. T
Nuclear power reactors are expensive to build but relatively cheap to operate
(x) Oil BURNS cleaner and is less damaging to the environment than coal as a fuel.[COLOR"]="blueT[/COLOR]


15. Match words of List A with those of List B

A....................B

Protein............Amino acid
Magnesium....Chlorophyll..
Carotene.........Vitamin A
Bauxite..........Aluminium.
Haemitite.......Iron.
Casein..........Milk..
Pancreas.........FATS
Quartz..........Silicon..
Chlorofluorocarbon.......Ozone.
Urea.............Nitrogen..

corrections are acceptible
rgds