Get premium membership and access questions with answers, video lessons as well as revision papers.
a) In the stomach there is acidic medium due to presence of hydrochloric acid (HCl) and ptyalin only acts at slightly alkaline medium hence its denatured or destroyed by a low pH.
b) High temperature above 40o, altering pH medium
c) - Presence of Villi
- Increased length
johnmulu answered the question on May 1, 2017 at 13:13
- a) Name a fat soluble vitamin manufactured by the human body.(b) State two functions of potassium ions in the human body(Solved)
a) Name a fat soluble vitamin manufactured by the human body.
b) State two functions of potassium ions in the human body
Date posted: May 1, 2017. Answers (1)
- The diagram below represents a section though a human tooth(Solved)
The diagram below represents a section though a human tooth
a) i) Name the type of tooth shown.
ii) Give a reason for your answer in (a)(i) above.
b) State the functions of potassium ions in the human body.
Date posted: May 1, 2017. Answers (1)
- a) State three functions of bile juice in the digestion of food.
(b) How does substrate concentration affect the rate of enzyme action? (Solved)
a) State three functions of bile juice in the digestion of food.
(b) How does substrate concentration affect the rate of enzyme action?
Date posted: May 1, 2017. Answers (1)
- a) Distinguish between the terms homodont and heterodont
b) What is the function of carnassial teeth?(Solved)
a) Distinguish between the terms homodont and heterodont
b) What is the function of carnassial teeth?
Date posted: May 1, 2017. Answers (1)
- State the role of vitamin C in humans (Solved)
State the role of vitamin C in humans
Date posted: May 1, 2017. Answers (1)
- State a function of the large intestine in humans (Solved)
State a function of the large intestine in humans
Date posted: May 1, 2017. Answers (1)
- What happens to excess fatty acids and glycerol in the body (Solved)
What happens to excess fatty acids and glycerol in the body
Date posted: May 1, 2017. Answers (1)
- a) State the function for co-factors in cell metabolism
b) Give one example of a metallic co -factor (Solved)
a) State the function for co-factors in cell metabolism
b) Give one example of a metallic co -factor
Date posted: May 1, 2017. Answers (1)
- State two functions of muscles found in the alimentary canal of mammals(Solved)
State two functions of muscles found in the alimentary canal of mammals
Date posted: May 1, 2017. Answers (1)
- What is meant by the term digestion?(Solved)
What is meant by the term digestion?
Date posted: May 1, 2017. Answers (1)
- Name a disease caused by lack of each of the following in human diet (a) Vitamin D (b) Iodine
(Solved)
Name a disease caused by lack of each of the following in human diet (a) Vitamin D (b) Iodine
Date posted: May 1, 2017. Answers (1)
- Name the disease in humans that is caused by lack of vitamin C.(Solved)
Name the disease in humans that is caused by lack of vitamin C.
Date posted: May 1, 2017. Answers (1)
- When is glycogen which is stored in the liver converted into glucose and released into the blood(Solved)
When is glycogen which is stored in the liver converted into glucose and released into the blood
Date posted: May 1, 2017. Answers (1)
- State two factors that affect enzymatic activities (Solved)
State two factors that affect enzymatic activities
Date posted: May 1, 2017. Answers (1)
- The set up below illustrates a procedure that was carried out in the laboratory with a leaf plucked from a green plant that had been growing in sunlight. (Solved)
The set up below illustrates a procedure that was carried out in the laboratory with a leaf plucked from a green plant that had been growing in sunlight.
i) What was the purpose of the above procedure?
ii) Give reason for carrying out steps A, B and C in this procedure.
iii) Name the reagent that was used at the step labelled D.
iv) State the expected result on the leaf after adding the reagent named in (iii) above.
Date posted: May 1, 2017. Answers (1)
- A potted plant was kept in the dark for 48 hours. Two leaves X and Y were treated as shown in the diagram below. (Solved)
A potted plant was kept in the dark for 48 hours. Two leaves X and Y were treated as shown in the diagram below.
The experimental set-up was kept in sun light for six hours after which a starch test was carried out on the two leaves
a) What were the results of the starch test on leaves X and Y?
b) Give reasons for your answers in (a) above
Date posted: May 1, 2017. Answers (1)
- The diagram below represents a set - up that was used to investigate certain process in a plant. (Solved)
The diagram below represents a set - up that was used to investigate certain process in a plant.
a) State the process that was being investigated
b) State a factor that would affect the process
Date posted: May 1, 2017. Answers (1)
- a) State the function of cristae in mitochondria.
b) The diagram below represents a cell organelle(Solved)
a) State the function of cristae in mitochondria.
b) The diagram below represents a cell organelle
i) Name the part labeled Y.
ii) State the function of the part labeled X
Date posted: May 1, 2017. Answers (1)
- The diagram below represents a cell.(Solved)
The diagram below represents a cell.
a) Name the parts labeled X and Y
b) Suggest why structures labelled X and would be more on one side than the other
Date posted: May 1, 2017. Answers (1)
- The graph below shows the effect of substrate concentration on the rate of enzyme reaction(Solved)
The graph below shows the effect of substrate concentration on the rate of enzyme reaction
a) i) Account for the shape of the graph between A and B.
ii) B and C
b) How can the rate of reaction be increased after point B?
c) State two other factors that affect the rate of enzyme reaction
Date posted: May 1, 2017. Answers (1)