Biology Work Sheet
(Tick the Correct option from the below options)
Anus
Rectum
Colon
Appendix
Q2) What is the aim of digestion?
(Tick the Correct option from the below options)
Obtain matter and energy
Obtain nutrients from food and break it down into small molecules, which are then absorbed
Break down food into inorganic nutrients
Obtain nutrients from food and transport it to the cells
(Tick the Correct option from the below options)
Stomach
Pancreas
Gall bladder
Liver
What is the term given to a ball- like mixture of food and saliva that forms in the
mouth?
(Tick the Correct option from the below options)
Peristalsis
Bolus
Mucus
Chyme
(Tick the Correct option from the below options)
Stomach
Pancreas
Gall Bladder
Liver
Q6) What type of digestion takes place in the stomach?
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Mechanical
Chemical
Mechanical and Chemical
None of the above
Q7) Where does the process of digestion begin?
(Tick the Correct option from the below options)
Esophagus
Mouth
Stomach
Small Intestine
Q8) Where does the absorption of nutrients from food take place?
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Stomach
Liver
Large Intestine
Small Intestine
Q9) What are the rhythmic muscular contractions of your Oesophagus called to help
food move along?
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Swallowing
Peristalsis
Inertia Contractions
Paralysis
Q10) Which organ prevents food from entering the windpipe?
(Tick the Correct option from the below options)
The Uvula
The Tongue
The Trachea
The epiglottis
Q11) What breaks food into smaller pieces to begin mechanical digestion?
(Tick the Correct option from the below options)
Teeth
Stomach
Esophagus
Amylase
Q12) Which Glands are associated with the Human Digestive System?
(Tick the Correct option from the below options)
Salivary glands and Pancreas
Salivary glands and Liver
Salivary glands, Liver and Pancreas
Liver and Pancreas
Q13) What is the acidic fluid that passes from the stomach following churning?
(Tick the Correct option from the below options)
Enzymes
Bolus
Mucus
Chyme
Q14) What is the function of the villi?
(Tick the Correct option from the below options)
To increase the absorption surface
To digest the last nutrients
To form feces
To digest fats
Q15) What is the function of the large intestine?
(Tick the Correct option from the below options)
The absorption of nutrients
The digestion of fats
The absorption of water and some vitamins, formation and storage of faeces.
Transport the nutrients to the blood stream
Q1) Digestion begins at the mouth
1a) Explain how teeth aid digestion?
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1b) Give two ways in which saliva aids digestion?
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Q2) Many sports drinks contain glucose. Athletes can also get energy from
starch in their diets.
Explain why glucose molecules can provide energy more quickly than starch.
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Q3) Why do large molecules need to be broken down into smaller food
molecules?
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Q4) One of the components of human saliva is the enzyme lysozyme that is
present in many body fluids and is responsible for breaking down the cell walls
of bacteria.
4a) Define the term Enzyme.
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The effect of human lysozyme on two common species of bacteria A and B was
investigated at two different values of pH.
The investigation was set up as shown in Fig 4.1.
The test-tubes were kept at 37o C for 24 hours.
After 24 hours, samples were taken from each test-tube. Each sample was placed onto nutrient
agar in Petri dishes. The dishes were incubated at 28o C fpr
a further 24 hours to allow any bacteria to grow.
The results are shown in Fig. 4.2
Explain the results shown in Fig. 4.2 by comparing the following pairs:
1 and 3 ...................................................................................................
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1 and 4 ...................................................................................................
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1 and 2 ...................................................................................................
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