VIRUDHUNAGAR DISTRICT ONE MARK QUESTIONS CLASS: 10 SUBJECT: SCIENCE
BIOLOGY
பத்தாம் வகுப்பு அறிவியல் உயிரியல் ஒரு மதிப்பெண் வினாக்கள் ஆங்கில வழி
1. Which one of the following hormones is naturally not found in plants?
2,4-D
GA3
Gibberellin
IAA
2. During transpiration there is loss of
carbon dioxide
oxygen
water
none of the above
3. 'Heart of heart' is called
SA node
AV node
Purkinji fibres
Bundle of His
4. The theory of natural selection for evolution was proposed by_______.
Charles Darwin
Lamarck
Libby
Mendel
5. Casparian strips are are presents in the ________ of the root
cortex/
pith
pericycle
endoderma
6. which is formed during anaerobic reaction?
Carbohydrate
Ethyl alcohol
Acetyl Co A
Pyruvate
7. Which is used to edit programs?
Inkspace
Script editor
Stage
Sprite
8. Excessive consumption of alcohol leads to
Loss of memory
Cirrhosis of liver
State of hallucination
Supression of brain function
9. Mammals are ______animals
Cold blooded
Warm blooded
Poikilothermic
All the above
10. Which one is referred as "Master gland"?
Pineal gland
Pituitary gland
Thyroid gland
Adrenal gland
11. Tobacco consumption is known to stimulate secretion of adrenaline. The component causing this could be
Nicotine
Tannuc acid
Curcumin
Leptin
12. A typical Mendelian dihybrid ratio is _____
9;3:3:1
12:3:4
3:1
9:3:4
13. Node of Raniver is found in
muscles
axons
dendrites
cyton
14. Okasari fragments are joined together by _______
Helicase
DNA polymerase
RNA primer
DNA ligase
15. The best way of direct dating of fossils of recent origin is by
Radio carbon method
Uranium carbon method
Pottasium- argon methof
Both (a) and (c)
16. In the Islets of Langerhans, beta cells secrete______.
insulin
Glucagon
Thyroixine
Parathormone
17. Pusa Komal is a resistant variety of _______.
sugarcane
rice
cow pea
maize
18. The endarch condition in the characteristics feature of
root
stem
leaves
flower
19. The body of leech has
23 segments
33 segments
38 segments
30 segments
20. The large elongated cells that provide nutrition to developing sperms are
Primary germ cells
Sertoli cells
Leydig cells
Spermatogonia
21. A protein rich wheat variety is ______.
Atlas 66
Himgari
Sonalika
Kalyan
22. Paleontologists deals with
Embrological evidences
Fossil evidences
Vestigial organ evidences
All the above
23. World 'No Tobacco Day' is observed on
May 31
June 6
April 22
October 2
24. The centrosome is found at the centre of the _______ chromosome.
Telocentric
Metacentric
Sub-metacentric
Acrocentric
25. The plant which propagates with the help of it's leaves is ______.
Onion
Neem
Ginger
Bryophyllum
26. Global warming will cause
raise in level of oceans
melting of glaciers
sinking of islanda
all the above
27. Which organ acts as both endocrine and exocrine?
Pancreas
Kidney
Liver
Lungs
28. Syngamy results in the formation of_______.
Zoospore
Conidia
Zygote
Chlamydomonas
29. We can cut the DNA with the help of
scissors
restriction endonucleases
knife
RNAase
30. Polyphagia is a condition seen in
Obesity
Diabetes mellitus
Diabetes insipidus
AIDS
