MCQ's CH 2, CLASS 7

An online test

https://www.examfear.com/test/Class-7/Biology/Nutrition-in-Animals.htm


MCQs:

Solve these and write the answers in your notebook. I will send the answer key tomorrow.

1. Which one is not a main gland of the digestive system

1 point

Salivary gland

Liver

Pancreas

Adrenal gland

2.Salivary glands are present in-

1 point

Mouth

Oesophagus

Stomach

Small Intestine

3. Saliva breaks down

1 point

Starch

Fat

Glucose

Protein

4.The process of taking food into the body through mouth is called-

1 point

Digestion

Ingestion

Absorption

Assimilation

5.Teeth which help in biting and cutting of food are

1 point

Incisors

Canines

Premolars

Molars

6.Total number of canines present in human mouth

1 point

8

4

12

6

7.Which teeth are maximum in an adult human mouth

1 point

Incisors

Canines

Premolars

Molars

8. Oesophagus is also known as

1 point

Wind pipe

Blood pipe

Food pipe

Urine pipe

9. Largest gland in human body is

1 point

Liver

Pancreas

Salivary gland

Pituitary gland

10.All green plants are

1 point

Autotrophs

Heterotrophs

Parasites

Saprotrophs

11. Which one is NOT true about bile Juice ?

1 point

Liver secretes bile juice

Bile juice is secreted by gall bladder

Bile juice is stored in gall bladder

Bile juice helps in breakdown of fat

12.The inner walls of the small intestine have millions of small finger like projections called

1 point

Villi

Milli

Trachae

Hilly

13. Absorption of food takes place in the

1 point

Stomach

Large intestine

Oesophagus

Small intestine

14. Grass is rich in ................,a special kind of carbohydrate which can only be digested by ruminants.

1 point

Cellulose

Glucose

Fructose

Sucrose

15. Which of the following is a ruminant ?

1 point

Buffalow

Cow

Camel

Goat

All of the above

16. Which statement is wrong ?

1 point

Amoeba is a single celled organism

Amoeba is a multicellular organism

Amoeba is found in pond water

Amoeba capture its food with the help of pseudopodia

17. We perform starch test to study the effect of saliva on starch.When we put 2-3 drops of Iodine solution on boiled rice, they turn

1 point

Blue -orange

Blue Black

Red-white

Yellow -Green

18. Milk teeth fall off at the age between

1 point

6-8 years

2-4 years

10-12 years

12-14 years

19. Which of the following is false-

1 point

Tooth decay means gradual damage of teeth

Bacteria converts sugar to acid,acid is responsible for tooth decay

Chocolates,Sweets and soft drinks are good for teeth.

one should not put dirty fingers or any unwashed object in the mouth.

Option 5

20. Oral Rehydration Solution (ORS) is related with -

1 point

Diarrhoea

Constipation

Vomiting

Headache

21. In ruminants cellulose of the food is digested in-

1 point

Mouth

Caecum

Small intestine

Oesophagus

22. In Amoeba digestion of food occurs in-

1 point

Pseudopodia

Food vacuole

Contractile vacuole

Nucleus

23. What is the mode of feeding in butterfly ?

1 point

Chewing

Brewing

Scraping

Sucking

24. Which organ has taste buds to detect different tastes of food ?

1 point

Tongue

Teeth

Nose

Salivary glands

25. Which acid is secreted in the stomach

1 point

Hydrochloric acid

Acetic acid

Sulphuric acid

Citric acid

Answers:
1. d
2. a
3. a
4. b
5. a
6. b
7. d
8. c
9. a
10.a
11. b
12. a
13. d
14. a
15. e
16. b
17.b
18. a
19. b
20. a
21. b
22.b
23. d
24. a
25.a

DNA sequencing (SANGER'S METHOD)

GOOGLE FORM FOR TEST, CLASS 12(SELECTION AND LIBRARY)

https://docs.google.com/forms/d/1i-LgH35pcFr2AiJcw39MxxMxFsY7_0hvsawGiliFp98/edit#question=810805550&field=31229383

ONLINE TEST LINK , CLASS 7, ch 1

7 May 2020
https://www.studiestoday.com/online-test-science-online-test-cbse-class-7-science-nutrition-plants-2-230056.html

One more set of mcqs
Dear students, take this simple test.
Tell me your score.
You can also check your answer at the end of the quiz.



4 May 2020
https://www.studiestoday.com/node/230057/take?destination=node/230057/take


Dear students, take this simple test.
Tell me your score.
You can also check your answer at the end of the quiz.

FIBRE TO FABRIC CH 3 (BACK EXERCISE) QUESTIONS, CLASS 7 WITH ANSWER KEY

Exercises
 1. You must be familiar with the following nursery rhymes:
(i) ‘Baa baa black sheep, have you any wool.’
 (ii) ‘Mary had a little lamb, whose fleece was white as snow.’ Answer the following:
                (a) Which parts of the black sheep have wool?
                (b) What is meant by the white fleece of the lamb?

2. The silkworm is (a) a caterpillar, (b) a larva.
 Choose the correct option. (i) a (ii) b (iii) both a and b (iv) neither a nor b.

3. Which of the following does not yield wool?
 (i) Yak (ii) Camel (iii) Goat (iv) Woolly dog

 4. What is meant by the following terms? (i) Rearing (ii) Shearing (iii) Sericulture

5. Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them. Shearing, __________, sorting, __________, __________.

 6. Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.

7. Out of the following, which are the two terms related to silk production?
Sericulture, floriculture, moriculture, apiculture and silviculture.
 Hints: (i) Hints: Silk production involves cultivation of mulberry leaves and rearing silkworms. (ii) Scientific name of mulberry is Morus alba.

 8. Match the words of Column I with those given in Column II:
           Column I                                                              Column II                                                                 1. Scouring                                                      (a) Yields silk fibres                                                           2. Mulberry leaves                                           (b) Wool yielding animal                                                 3. Yak                                                              (c) Food of silk worm
       4. Cocoon                                                        (d) Reeling                                                                                                                                                  (e) Cleaning sheared skin

 9. Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.
 Down                                                  Across                                                                                             (D) 1 : Thorough washing                 (A) 1 : Keeps warm                                                                               2 : Animal fibre                                 2 : Its leaves are eaten by silkworms                                               3 : Long thread like structure            3 : Hatches from egg of moth

Exercise Questions With Answers

1. You must be familiar with the following nursery rhymes:

(i) ‘Baa baa black sheep, have you any wool.’

(ii) ‘Mary had a little lamb, whose fleece was white as snow.’

Answer the following:

(a) Which parts of the black sheep have wool?

(b) What is meant by the white fleece of the lamb?

Solution:

a) Wool is obtained from hairy fibres of the sheep.

b) White fleece of the lamb refers to the white colour of their fur.

2. The silkworm is (a) a caterpillar, (b) a larva.

Choose the correct option. (i) a (ii) b (iii) both a and b (iv) neither a nor b.

Solution:

(iii) both a and b

3. Which of the following does not yield wool?

(i) Yak (ii) Camel (iii) Goat (iv) Woolly dog

Solution:

The answer is (iv) Woolly dog

4.What is meant by the following terms? (i) Rearing (ii) Shearing (iii) Sericulture

Solution:

i) Raising of domestic animals like sheep, goat, yak, cow and buffaloes for commercial purposes such as for milk and fur is known as rearing.

ii) Shearing is a process of removal of animal hair by using machines similar to those used by barbers.

ii) Rearing of silkworms to get silk is known as Sericulture.

5. Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them.

Shearing, __________, sorting, __________, __________, _________.

Solution:

Shearing, Scouring, sorting, picking of burrs, dying of fibres, making of yarn.

6. Make sketches of the two stages in the life history of the silk moth which are directly related to the production of silk.

Solution:

7. Out of the following, which are the two terms related to silk production?

Sericulture, floriculture, moriculture, apiculture and silviculture.

Hints: (i) Silk production involves cultivation of mulberry leaves and rearing silkworms. (ii) Scientific name of mulberry is Morus alba

Solution:

Sericulture and moriculture

8. Match the words of Column I with those given in Column II:

Column-I	Column-I
1. Scouring	(a) Yields silk fibres
2. Mulberry leaves	(b) Wool yielding animal
3. Yak	(c) Food of silkworm
4. Cocoon	(d) Reeling
	(e) Cleaning sheared skin

Solution:

Column-I	Column-I
1. Scouring	(e) Cleaning sheared skin
2. Mulberry leaves	(c) Food of silkworm
3. Yak	(b) Wool yielding animal
4. Cocoon	(a) Yields silk fibres

9. Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.

Down

(D) 1 : Thorough washing

2 : Animal fibre

3 : Long thread like structure

Across

(A) 1 : Keeps warm

2 : Its leaves are eaten by silkworms

3: Hatches from egg of moth

Solution:

Down:

1D. Scour

2D. Silk

3D. Fibre

Across

1A. Wool

2A. Mulberry

3A. Caterpillar

WORKSHEET ( SELECTION OF RECOMBINANTS AND GENOMIC LIBRARY) CLASS XII

1. How are genomic libraries different from cDNA libraries? Schematically depict the various steps         involved in generating a genomic library?                        (5)
2. How will you select bacterial cells carrying a recombinant plasmid?          (3)
3. How Lac Z gene can be used as a screening marker? Name one another selectable marker. (2)
4.Why cDNA is preferred over genomic DNA in molecular researches?         (2)
5. Explain the role of insertional inactivation in rDNA technology?                (5)
6.  Explain briefly a technique for visual screening of transformed bacteria.   (2)
7. An unusual plasmid has been discovered which has high transformation ability in E.coli and                confers heat resistance to the host. Hence the host E.coli when transformed with this plasmid can        grow at 50 degree celsius. Schematically represent the various steps of cloning a foreign gene in          this plasmid. How would you screen the transformed E.coli carrying this plasmid?      (3)