Sunday, September 12, 2010

RRB Exam General Science

1. Which of the following is not a bone in the
human body?
(a)Sternum
(b) Humerus
(c)Pericardium
(d) Tibia

Ans : c

2. Rennin and lactase, the enzymes required to digest milk, disappear in the human body by the age of
(a) two
(b) three
(c) five
(d) eight

Ans : a

3. Duodenum is situated
(a) at the uppermost part of the small intestine
(b) near the lungs
(c) in the brain
(d) at the tail end of the intestine

Ans : a

4. The heart is covered by a membrane called
(a) Epidermis
(b) Dermis
(c)Epicardium
(d) Pericardium

Ans : d

5. About ……..of the total calcium present in the human body is in the blood.
(a) 99%
(b) 70%
(c) 5%
(d) 1%

Ans : d

6. Phenylketonuria is an example of an inborn error of metabolism. This ‘error’ refers to
(a) hormonal overproduction
(b) non disjunction
(c) atrophy of endocrine glands
(d) inherited lack of an enzyme

Ans : c

7. As in the arms and legs, blood flows against gravity and is prevented from flowing back by
(a) the extremely low pressure of venous blood
(b) valves
(c) movements in the surrounding muscles
(d) the narrowing down of the lumen of veins by the contraction of the muscle layer comprising their walls

Ans : b

8. Identical twins arise when two
(a) cells develop independently from the same zygote
(b) gametes develop independently
(c) sperms develop independently
(d) ova develop independently

Ans : a

9. Element that is not found in blood is
(a)iron
(b) copper
(c)chromium
(d) magnesium

Ans : c

10. Scratching eases itching because
(a) it kills germs.
(b) it suppresses the production of enzymes which cause itching,
(c) it removes the outer dust in the skin.
(d) it stimulates certain nerves which direct the brain to increase the production of antihistaminic chemicals.

Ans : d

11. The gland, which in relation to body size is largest at birth and then gradually shrinks after puberty, is?
(a) Thyroid
(b) Pituitary
(c)Thymus
(d) Adrenal

Ans : c

12. A human sperm may contain ?
1. X-chromosome
2. Y-chromosome
3. XY-chromosome
(a) 1 only
(b) 2 only
(c)1 and 2
(d) l,2 and 3

Ans : c

13. Which of the following is not a bone in the legs
of human body?
(a) Radius
(b) Tibia
(c) Femur
(d) Fibula

Ans : a

14. Bleeding from artery is characterised by which of the following?
1. Blood is red.
2. Blood is purple.
3. Bleeding is continuous.
4. Bleeding is intermittent.
(a)1 and3
(b) 2 and 3
(c)1 and 4
(d) 2 and 4

Ans : b

15. Which of the following is not a vestigial organ?
(a) Centriole
(b) Molar tooth
(c) Appendix
(d) Diaphragm
Ans : d

16. Which of the following bone articulations forms the gliding joint?
(a) Humenis and radius
(b) Carpals
(c) Hip girdle and femur
(d) Skull & neck verterbrae

Ans : b

17. Pancreas secretes hormones which help in
(a) blood clotting
(b) production of antibodies
(c) growth of body
(d) keeping sugar balance in body

Ans : d

18. S-A node of mammalian heart is known as
(a) Autoregulator
(b) Pace-maker
(c) Time controller
(d) Beat regulator

Ans : b

19. Consider the following statements regarding blood pressure:
1. It is the pressure exerted by the blood on the walls of any vessel.
2. It decreases in the arteries as the distance from the heart increases,
3. It is lower in the capillaries than in the arteries.
4. It is usually lower in women than in men.
Of these, the correct ones are
(a)1 and 4
(b) l, 2and 3
(c)2,3 and 4
(d) l,2,3 and 4

Ans : d

20. The hormone responsible for the secretion of milk in mothers, is?
(a) ACTH
(b) Leutinizing hormone
(c) Adrenalin
(d) Lactogenic hormone

21. What is the correct sequence of the following in heart attack?
1. Narrowing of the inner orifice of the vessel
2. ‘Plaque’ from fibrous tissue and high cholesterol
3. Inadequate supply of blood and oxygen
4. Clots of blood carried into the coronary arteries
(a)1,2,3,4
(b) 2,4, 1,3
(c) 2, 3, 1, 4
(d) 4, 2, 1 3

Ans : b

22. Bile juice is secreted by
(a)Pancreas
(b) Liver
(c)Spleen
(d) Gall bladder
Ans : b

23. Veins differ from arteries in having
(a) thinner walls
(b) strong walls
(c) narrower lumen
(d) valves to control direction of flow

Ans : d

24. What is the main function of insulin in the hman body?
(a) To maintain blood pressure
(b) To help in digestion of food
(c) To control the level of sugar in the body
(d) To check the level of iodine in the body

Ans : c

25. An enzyme that works in an acidic medium is
(a) pepsin
(b) tiypsin
(c) ptyalin
(d) maltose

Ans : a

26. The blood pressure is the pressure of blood in
(a)arteries
(b) veins
(c)auricles
(d) ventricles

Ans : a

27. The total number of bones in human skull are
(a) 8
(b) 12
(c) 30
(d) 32

Ans : c

28. Which of the following glands controls the development of sex organs in humans?
(a) Paancreas
(b) Thyroid
(c) Adrenal
(d) Pituitary

Ans : d

29. Oxygen is transported to every cell of the human
body by?
(a)red blood cells
(b) blood platelets
(c)white blood cells
(d) hormones

Ans : a

30. Which of the following components of blood protects human beings from infection?
(a) Plasma
(b) Blood Platelets
(c) Haemoglobin
(d) White Blood Corpuscles

Ans : d

31. The normal temperature of the human body is
(a) 90 F
(b) 98 F
(c) 98.4 F
(d)96.4 F

Ans : c

32 .If a person can see an object clearly when it is placed at distance of about 25 cm away from him, he is suffering from
(a) myopia
(b) hypermetropia
(c) astigmatism
(d) None of these
Ans : d

33. The blood pressure values of four persons are
given below:
1. Mrs.X-90/60
2.Mr.X-160/120
3. Mr. Y-120/80
4.Mrs.Y-140/l00

Who among the following has normal blood pressure?
(a) Mrs. Y
(b) Mr. X
(c) Mrs. X
(d) Mr. Y

Ans : d

34. In the case of a ‘Test-tube baby’?
(a) fertilisation takes place inside the test tube.
(b) development of the baby takes place inside the test tube.
(c) fertilisation takes place outside the mother body.
(d) unfertilised egg develops inside the test tube.

Ans : c

35. Pituitary gland is present
(a) below the brain
(b) above the brain
(c) inside the brain
(d) nowhere near the brain

Ans : a

36. Which of the following organs is used in the purification of blood in human body?
(a) Liver
(b) Kidney
(c) Spleen
(d) Lungs

Ans : d

37. Cornea is a part of which of the following organs
of human body?
(a) Eye
(b) Ear
(c) Nose
(d)Heart

Ans : a

38. What is Funny Bone?
(a) A muscle
(b) A nerve
(c) A bone
(d) A blood vessel

Ans : b

39. Man cannot digest cellulose whereas cows can do so because?
(a) their gut contains bacteria capable of digesting cellulose.
(b) they have a many – chambered stomach.
(c) they have efficient grinding molars.
(d) they produce an enzyme cellulase which can digest cellulose.

Ans : a

40. Which of the following when taken by pregnant women, is found to be the cause of deformed children?
(a) Glycerol
(b) Xylidine
(c) Thalidomide
(d) None of these
Ans : c

41. The diploid number of chromosomes in human body is ?
(a) 24
(b) 40
(c) 46
(d) 48

Ans : c

42. The largest cell in the human body is
(a) Nerve cell
(b) Muscle cell
(c) Liver cell
(d) Kidney cell

Ans : a

43. Lichens are formed due to the symbiotic association of

(a) moss and fungi
(b) bacteria and fungi
(c) algae and fungi
(d) None of these

Ans : c

44. Insects form the largest class of animals living on land and sea. They are grouped into
(a) 22 orders
(b) 26 orders
(c) 29 orders
(d) 32 orders

Ans : c

45. Which of the following statements is true for planktons?

(a) They live on the surface of lake water.
(b They live on the bottom of lakes.
(c) They live on the plants growing in water.
(d) They live in the water column.

Ans : b

46. Which of the following has the smallest egg?
(a) Ostrich
(b) Humming bird
(c) Pigeon
(d) Homo sapiens

Ans : c

47. The population of which of the following is maximum on the earth?
(a) Reptiles
(b) Fishes
(c) Birds
(d) Beetles

Ans : d

48. Poison glands of snakes are homologous to
(a) stings of rays
(b) salivary glands of vertebrates
(c) electric organs of fishes
(d) sebaccous glands of mammals

Ans : b

49. The phylum chordata is characterised by the presence of
(a) spinal cord
(b) notochord
(c) nerve chord
(d) None of these

Ans : d

50. Which of the following activities is suppressed by the presence of auxins in plants?
(a) Growth of lateral buds
(b) Cell division
(c) Root initiation
(d) Development of fleshy fruits

Ans : c

Posted by at
Labels:

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)

CURRENT AFFAIRS PREPARATION PLAN

“Current Affairs” and “General Knowledge” cover many topics like from economy to sports or education to politics, or even technology to automobiles. In every second some issues are happening around the world in these sectors, and to accumulate the excerpt of some highlighted news, and memorize it is a good plan to prepare current affairs and GK.

Some Important Tips to Follow:

Read Newspapers regularly

We all know that “Old is Gold”, same thing applies here too. We need to make a habit of reading newspapers regularly. I’ll suggest you to read more than one newspaper. It will be better if you read one newspaper of your mother language, and other of English. Some useful newspapers are “The Times of India”, “The Hindu”, “The Telegraph” etc. You need to start this habit at least 6 months before the actual exam that will help you to get access to all the important events of that period of time.

You need to keep an eye on what’s happening around you in your country and world as well. Trust me guys, you will surely find it interesting after several days. We all know that staying updated is always a good idea, as it will stand you apart from the rest.

Read Magazines thoroughly

This is another great option to prepare the subject we are talking about. There are many leading magazines that focus on current affairs and General Knowledge. You need to buy it from your local magazine seller, and start reading it thoroughly. These magazines beautifully categorize the articles with its genres to make it interesting to read on. Some of the useful magazines are Pratiyogita Darpan andManorma.

Try to read some business magazines and sports magazines too along with a general magazine. This will increase your chances of cracking the competitive exams with ease. Some useful business magazines areBusiness Today, Business Line etc.

Follow News Channels

You will need to follow news channels at least once a day. Now most of the leading news channels are active for 24*7. You need to pick up a suitable time for yourself to watch any favorite news channel of yours. You can watch ABP News, NDTV, Times Now, ET Now, Zee News etc. Try to go through all the breaking and highlighted news, and make it a habit.

I know that watching news channels for long will bore you, so I’ll suggest you to allocate only 30 minutes for it in a whole day. All the leading ones shows the glimpses of all important events of the day quite frequently, so 30 minutes will be enough for you to boost up your current affairs and GK knowledge.

Maintain a Diary

My teacher used to tell me that whenever you learn something try to write it down in your diary, as it will help you to memorize it in a better manner. He is so right, as this method helped me a lot to score good marks in every exam that I appeared for. As I already mentioned before that a lot of events are occurring in the country and around the world, so it is easily understandable that it is not easy to remember everything. It’s always a superb idea to maintain a diary of current events.

You need to update this diary on a daily basis with all the events that you consider as important ones. This diary will become quite useful for the revision part, as it will provide you information about all the important events at a place. You should keep revising the diary frequently, as it will help you to memorize important names, dates, awards etc.

Channelize your Preparation Accordingly

All the competitive exams are not same, as all of them have different pattern, even when it comes to the same topic as ‘Current Affairs’ or ‘GK’. For example for civil services exam, you need to give importance on events of National value. On the other scenario, in matter of bank job exam, the focus should be on the news on banking sectors, and economic and business news.

Thus I’ll suggest you to prepare as per the exams you are appearing for, as channelizing your preparation according to the pattern of the exam will accelerate your chance of getting selected.

Use Internet Resources

“Google, YouTube and Wikipedia are my favorite teachers’; one of my friends told me this once. This is quite true indeed, so you should use all the available online resources to study current affairs and GK for exams. For example this blog is all about “Current Affairs”, so you can check this blog regularly by subscribing to us (check the sidebar for subscription options). You can actively take part some forums that are focusing on current events. The good part is you can follow the websites of all leadingnewspapers online if you don’t have enough time to read newspapers.

Use Social Networking Sites for Good

Believe me or not you can surely use social networking sites to your benefits. Especially to prepare current affairs and General knowledge Facebook, Twitter, LinkedIn and StumbleUpon may help you a lot. You can join some Facebook pages, or follow some twitter accounts that are related to current affairs. You can join our Facebook Page too for this matter, or connect with me at LinkedIn or circle me in Google Plus for all the information on recent happenings to boost up your General Knowledgeability.

Give Priority to your Strength

We usually find difficulties when we try to learn everything at once. In that process basically we study a lot, but remember a little. We need to first select our strength areas for our preparation. Try to givepriority to your strength areas. It may be Sports, economy, Government Affairs or technology. Suppose you are applying for Bank exams, then you should prepare industry related news. Along with that you may pick any 2-3 areas of your strength like sports or technology. You need to prepare these sections to the utmost level. I can assure you that these strategies will help you to score much better in Current Affairs section.

Participate in Online Quizzes

You should participate in some free quizzes that are available online to evaluate yourself. For this matter you can easily access our “Quiz Section”. This will give you proper idea whether you are ready for the big exam day or not. As an added factor it will also provide you confidence i.e. very much essential. You can download Monthly-wise current affairs questions from Here.