A student used the following steps in testing for a non-reducing sugar.
I. added Benedict’s solution to the sugar solution
ll. added dilute hydrochloric acid to the sugar and boiled it;
lll. added sodium hydroxide solution to the solution in ll. and boiled;
IV. added Benedict’s solution to the cooled solution in lll.
Use this information above to answer the question.
Why did the student add the dilute hydrochloric acid to the sugar solution in step ll? To
- A. oxidize the sugar solution
- B. hydrolyse the sugar solution
- C. dry the sugar solution
- D. increase the volume of the sugar solution
The main difference between a seed and a fruit is that a fruit
- A. is large while a seed is small
- B. has two scars while a seed is has one
- C. is pigmented while a seed is not
- D. can be dispersed by animals while a seed cannot
Which of the following characteristic features is not associated with monocotyledonous plants?
- A. Well differentiated sepals and petals
- B. Presence of fibrous root system
- C. Presence of narrow leaves
- D. Flora parts are in multiples of three
Which of the following processes removes carbon (IV) oxide from the atmosphere?
- A. Burning fuels
- B. Putrefaction
- C. Photosynthesis
- D. Respiration in plants
Ability of the human eye to focus images accurately on the retina is called
- A. astigmatism
- B. myopia
- C. adjustment
- D. accommodation
A person had an accident that affected the skull but not the nose and later lost the sense of smell. The accident must have a affected the
- A. nose by extension
- B. olfactory lobes of the brain
- C. passage from the nose to the brain
- D. part of the skull near the nose
A farmer who wants to keep seeds for three years before planting and wants to prevent them from sprouting uses
- A. auxin
- B. gibberellins
- C. abscisin
- D. cytokinins
Blood pressure is higher in the arteries as a result of
- A. stree
- B. contraction and relaxation
- C. blockage in the arteries
- D. presence of valves
A plant that commonly undergoes vegetative propagation by means of leaves is
- A. Hibiscus
- B. Bryophylum
- C. Crotalaria
- D. Spirogyra
Which of the following features could be used to determine the growth of a seedling?
- A. Number of flowers
- B. Number of leaves
- C. Length of flowers
- D. Length of radicle
Water and salts are both lost from the human body in
- A. breath and sweat
- B. breath and Urine
- C. breath, urine and sweat
- D. sweat and urine
When a Spirogyra filament is placed in a concentrated salt solution for 30 minutes, the cell would become
- A. plasmolysed
- B. turgid
- C. shortened
- D. elongated
Which of the following cells is a specialized cell?
- A. Amoeba
- B. Plasmodium
- C. Guard cell
- D. Meristematic cell
The structure of the cell membrane is a
- A. double layer and a double protein layer
- B. middle bi-layer of protein with a lipid layer on either surface
- C. middle bi-layer of lipid with a protein layer on either surface
- D. protein layer with two inner lipid layers
Which of the following organisms is not a protozoan?
- A. Amoeba
- B. Ascaris
- C. Plasmodium
- D. Paramecium