Free Online GK objective test Science Questions

Free Online GK objective test Science Questions
Free Online General Knowledge Preparation Test Science
1. Oxyntic cells in stomach mainly secrete-
(a) Pepsin
(b) H C I
(c) Mucous
(d) Lipase
(e) Ptyalin
Answer. (b)

2. Streptomycin was discovered by-
(a) Alexander Flemings
(b) Joseph Lister
(c) Wakesman
(d) W. Shockley
(e) None of these
Answer. (c)

3. A cardiogram is used to trace the-
(a) Growth of plants
(b) Pulsation of the cardiac nerve
(c) Defects in the small intestine
(d) Proper heart function
(e) Function of lungs
Answer. (d)

4. The poor children of the under developed Countries normally suffer
from a disease Known as kwashiorkor. It is due to the Deficiency of-
(a) Iron
(b) Calcium
(c) Vitamin A
(d) Vitamin B
(e) Protein
Answer. (e)

5. Edward Jenner discovered-
(a) Antiseptic surgery
(b) Small pox Vaccine
(c) Insulin
(d) Malaria parasite
(e) Radium
Answer. (b)

6. Which of the following is proteolytic Enzyme?
(a) Adenine
(b) Insulin
(c) Diastase
(d) Pepsin
(e) Thymine
Answer. (d)


7. Who was the founder of Homeopathy?
(a) Berliner
(b) Robert Koch
(c) Hahnemann
(d) Broquet
(e) Elias How
Answer. (c)

8. Pigmented layer of the eye is known as-
(a) Retina
(b) Sclerotic
(c) Choroid
(d) Cornea
(e) Cone
Answer. (c)

9. Blood group of an individual is determined
By-
(a) Hemoglobin
(b) Antigen on R B C
(c) Antigen on W B C
(d) Genes
(e) Both, by RBC and WBC
Answer. (b)

10. What is allergy?
(a) It is a high altitude disease
(b) It is an abnormal reaction of the body by
The introduction of a foreign substance
(c) It is an attitude of repulsion towards
One’s enemies
(d) It is a bad habit of backbiting others
(e) It is a high blood pressure disease
Answer. (b)

11. The bacteria, which decompose nitrates of
The soil to set free nitrogen, are called-
(a) Nitrifying bacteria
(b) Symbiotic bacteria
(c) Nitrosifying bacteria
(d) Denitrifying bacteria
(e) Nitrogenous bacteria
Answer. (d)


12. According to scientists, the Big Bang occurred approximately ? years ago.
(a) 100 million
(b) 100 thousand
(c) 1 billion
(d) 15 billion
Ans. (d)


13. PASTEUR succeeded in disproving the spontaneous generation theory because
(a) he was lucky
(b) he was ingenious in drawing out the neck of glass flasks, so as to provide access to air but not to microorganisms
(c) of the fact that sample of yeast taken by him was dead
(d) of the clear surrounding of his laboratory
Ans. (b)


14. Lateral meristem is responsible for
(a) Growth in parenchyma
(b) Growth in thickness
(c) Growth in cortex
(d) Growth in length.
Ans. (b)

15. As a tree grows older, which increases more rapidly in thickness?
(a) Sapwood
(b) Cortex
(c) Phloem
(d) Heartwood
Ans. (d)

16. The first organisms were
(a) primitive eukaryotes
(b) aerobic bacteria
(c) prokaryotic
(d) photosynthetic
Ans. (c)

17. Why was the primitive atmosphere of Earth more beneficial to the origin of life than the modern atmosphere of Earth?
(a) The primitive atmosphere had a layer of ozone that shielded the first delicate cells
(b) The primitive atmosphere was reducing one that facilitated the formation of complex
substances from simple molecules
(c) The primitive atmosphere was an oxidising one that facilitated the formation of complex substances from simple molecules
(d) The primitive atmosphere has less free energy than the modern atmosphere, and thus newly formed organisms were less likely to be destroyed
Ans. (b)
18. What is the other name for the cork tissue?
(a) Phellogen
(b) Phelloderm
(c) Phellem
(d) Periderm
Ans. (c)

19. Russian scientist who proposed the theory of origin of life was
(a) Oparin
(b) Miller
(c) Haldane
(d) Fox
Ans. (a)

20. Commercial cork is obtained from the species of
(a) Berberis
(b) Quercus
(c) Salix
(d) Betula
Ans. (b)

21. In their laboratory simulation of early Earth, Miller and Urey observed the abiotic synthesis
(a) amino acids
(b) coacervates
(c) DNA
(d) liposmes
Ans. (a)

23. The cross-section of a trunk of a tree showed 50 annual rings. The age of tree is
(a) 50 years
(b) 50 months
(c) 100 years
(d) 25 years
Ans. (a)

24. The richest source of fossils is
(a) basalt
(b) granite
(c) lava
(d) Sedimentary rock
Ans. (d)

25. Trees at seashore do not have annual rings because
(a) There is climatic variation
(b) There is no marked climatic variation
(c) There is enough moisture in the atmosphere
(d) Soil is sandy
Ans. (b)