CHAPTER 6 : LIFE PROCESSES-1

Name of the Student : *

School : *

District : *

1) Which of the following statements about the autotrophs is incorrect? *

1 point

(a) They synthesize carbohydrates from CO2 and water in the presence of sunlight and chlorophyll.

(b) They store carbohydrates in the form of starch.

(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight.

(d) They constitute the first trophic level in food chains.

2) In which of the following groups of organisms, food material is broken down outside the body and absorbed? *

1 point

(a) Mushroom, green plants, Amoeba

(b) Yeast, mushroom, bread mould

(c) Paramecium, Amoeba, Cuscuta

(d) Cuscuta, lice, tapeworm

3) Select the correct statement : *

1 point

(a) Heterotrophs do not synthesise their own food

(b) Heterotrophs utilise solar energy for photosynthesis

(c) Heterotrophs synthesise their own food

(d) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates

4) Which is the correct sequence of parts in human alimentary canal? *

1 point

(a) Mouth → stomach → small intestine → oesophagus → large intestine

(b) Mouth →oesophagus → stomach → large intestine → small intestine

(c) Mouth → stomach → oesophagus → small intestine → large intestine

(d) Mouth → oesophagus → stomach → small intestine → large intestine

5) If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected? *

1 point

(a) Proteins breaking down into amino acids

(b) Starch breaking down into sugars

(c) Fats breaking down into fatty acids and glycerol

(d) Absorption of vitamins

6) The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct one : *

1 point

(a) Pepsin

(b) Mucus

(c) Salivary amylase

(d) Bile

7) Which part of alimentary canal receives bile from the liver? *

1 point

(a) Stomach

(b) Small intestine

(c) Large intestine

(d) Oesophagus

8) A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains : *

1 point

(a) complex proteins

(b) simple proteins

(c) fats

(d) starch

9) In which part of the alimentary canal food is finally digested? *

1 point

(a) Stomach

(b) Mouth cavity

(c) Large intestine

(d) Small intestine

10) Choose the function of the pancreatic juice from the following : *

1 point

(a) trypsin digests proteins and lipase carbohydrates

(b) trypsin digests emulsified fats and lipase proteins

(c) trypsin and lipase digest fats

(d) trypsin digests proteins and lipase emulsified fats

11) When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of : *

1 point

(a) oxygen

(b) carbon dioxide

(c) nitrogen

(d) water vapour

12) The correct sequence of anaerobic reactions in yeast is : *

1 point

(a) Glucose --(in cytoplasm)--> Pyruvate --(in mitochondria)--> Ethanol + Carbon dioxide

(b) Glucose --(in cytoplasm)--> Pyruvate --(in cytoplasm)--> Lactic Acid

(c) Glucose --(in cytoplasm)--> Pyruvate --(in mitochondria)--> Carbon dioxide + water

(d) Glucose --(in cytoplasm)--> Pyruvate --(in cytoplasm)--> Ethanol + Carbon dioxide

13) Which of the following is most appropriate for aerobic respiration? *

1 point

(a) Glucose --(in mitochondria) --> Pyruvate --(in cytoplasm)--> CO2+H2O+ Energy

(b) Glucose --(in cytoplasm) --> Pyruvate --(in mitochondria)--> CO2+H2O+ Energy

(c) Glucose --(in cytoplasm) --> Pyruvate + Energy --(in mitochondria)--> CO2+H2O

(d) Glucose --(in cytoplasm) --> Pyruvate + Energy --(in mitochondria)--> CO2+H2O+Energy

14) Which of the following statement(s) is (are) true about respiration? (i) During inhalation, ribs move inward and diaphragm is raised (ii) In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air (iii) Hemoglobin has greater affinity for carbon dioxide than oxygen(iv) Alveoli increase surface area for exchange of gases *

1 point

(a) (i) and (iv)

(b) (ii) and (iii)

(c) (i) and (iii)

(d) (ii) and (iv)

15) Which is the correct sequence of air passage during inhalation? *

1 point

(a) Nostrils → larynx → pharynx → trachea → lungs

(b) Nasal passage → trachea → pharynx → larynx → alveoli

(c) larynx → nostrils → pharynx → lungs

(d) Nostrils → pharynx → larynx → trachea → alveoli

16) During respiration exchange of gases take place in : *

1 point

(a) trachea and larynx

(b) alveoli of lungs

(c) alveoli and throat

(d) throat and larynx

17) The autotrophic mode of nutrition requires : *

1 point

(a) carbon dioxide and water.

(b) chlorophyll.

(c) sunlight.

(d) all of the above.

18) The breakdown of pyruvate to give carbon dioxide, water and energy takes place in : *

1 point

(a) cytoplasm.

(b) mitochondria.

(c) chloroplast.

(d) nucleus.

19) The following are energy foods : *

1 point

(a) Carbohydrates and Fats

(b) Proteins and mineras

(c) Vitamins and Lipids

(d) Water and roughage

20) The mode of nutrition in fungi is : *

1 point

(a) Autotrophic nutrition

(b) Holophytic nutrition

(c) Saprotrophic nutrition

(d) Parasitic nutrition

21) The contraction and expansion movement of the walls of the food pipe is called : *

1 point

(a) transportation

(b) transpiration

(c) peristalsis

(d) digestion

22) Name the substances whose build up in the muscles during physical exercise may cause cramps? *

1 point

(a) Ethanol + Carbon dioxide + Energy

(b) Lactic acid + Energy

(c) Carbon dioxide + Water + Energy

(d) Pyruvate

23) The respiratory pigment in human beings is: *

1 point

(a) carotene

(b) chlorophyll

(c) haemoglobin

(d) melanin

24) The digestive enzymes present in the pancreatic juice are : *

1 point

(a) Lipase + Trypsin

(b) Maltase + Pepsin

(c) Peptidase + Sucrase

(d) Lactase + Amylase

25) The chlorophyll in photosynthesis is used for : *

1 point

(a) Absorbing sunlight

(b) Reduction of CO2

(c) Breaking down water molecule

(d) No function

26) Oxygen liberated during photosynthesis comes from : *

1 point

(a) water

(b) chlorophyll

(c) carbon dioxide

(d) glucose

27) The internal (cellular) energy reserve in autotrophs is : *

1 point

(a) glycogen

(b) protein

(c) starch

(d) fatty acid

28) Which of the following equations is the summary of photosynthesis? *

1 point

(a) 6CO2 + 12H2O → C6H12O6 + 6O2+ 6H2O

(b) 6CO2 + H2O + Sunlight→ C 6H12O6 + O2+ 6H2O

(c) 6CO2 + 12H2O + Chlorophyll + Sunlight→ C6H12O6 + 6O2+ 6H2O

(d) 6CO2+ 12H2O + Chlorophyll + Sunlight→ C6H12O6 + 6CO2+ 6H2O

29) Choose the event that does not occur in photosynthesis : *

1 point

(a) Absorption of light energy by chlorophyll

(b) Reduction of carbon dioxide to carbohydrates

(c) Conversion of light energy to chemical energy

(d) Oxidation of carbon to carbon dioxide

30) During deficiency of oxygen in tissues of human beings, pyruvic acid is converted into lactic acid in the : *

1 point

(a) cytoplasm

(b) chloroplast

(c) mitochondria

(d) golgi body

31) The following events occur during photosynthesis process : *

1 point

(a) Absorption of light energy by chlorophyll.

(b) Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen.

(c) Reduction of carbon dioxide to carbohydrates.

(d) All the above

32) Saliva contains an enzyme called amylase. If this enzyme is deficient, what action in the mouth is disturbed? *

1 point

(a) proteins into amino acid

(b) converting starch into maltose

(c) breaking down of fat into fatty acids & glycerol

(d) absorbing digested food

33) The part of alimentary canal that absorbs the digested food : *

1 point

(a) Mouth

(b) Stomach

(c) Small intestine

(d) Large Intestine

34) Which of these is digested in the stomach? *

1 point

(a) Sugar

(b) Protein

(c) Fat

(d) Vitamin

35) The opening and closing of stomata is depending on this factor : *

1 point

(a) Oxygen

(b) Nitrogen

(c) Carbon dioxide

(d) Water in guard cells

HUMAN ALIMENTARY CANAL :

(a) OPEN (b) CLOSED STOMATAL PORE :

NUTRITION IN AMOEBA :

BREAK-DOWN OF GLUCOSE BY VARIOUS PATHWAYS :

GOPALA RAO C K

GHS (RMSA) THORALAKKI, MALUR TALUK, KOLAR DISTRICT 563137