Get premium membership and access questions with answers, video lessons as well as revision papers.
i) Disaccharides
These are complex sugars formeed by linking two monosaccharide units through condensation.
They have a general formula CHHZZOH. The bond that holds two monosaccharide units is called glycosidic bond.
Examples of disaccharides include:
Maltose-common in germinating seeds
Sucrose-fruits and sugar cane. Sucrose is the form in which carbohydrates are transported in plants
Lactose- found in milk
ii) Properties of Disaccharides
They are sweet tasting
They are crystallizable
They are water soluble
While they are non reducing sugars, some such as maltose is sugar reducing and is known as a complex reducing sugar.
They can be broken down into their constituent monosaccharide units through hydrolysis. Hydrolysis is the process through which complex molecules are broken down in the presence of water molecules.
In living systems, hydrolysis is carried out by enzymes. However, in the laboratory, hydrolysis can be carried out by boiling the disaccharide in dilute aid such as hydrochloric acid.
iii) Functions
They are hydrolyzed into monosaccharides and respired on to yield energy
They are the form in which carbohydrates are transported in plants due to their soluble and inert nature.
Anganifelix answered the question on May 9, 2018 at 16:36
- (i) What are carbohydrates? (ii) State the properties and characteristics of Monosaccharides (Solved)
i) What are carbohydrates?
ii) What are Monosaccharides?
iii) State the properties and characteristics of Monosaccharides
Date posted: May 9, 2018. Answers (1)
- Describe an experiment on factors necessary for photosynthesis.(Solved)
Describe an experiment on factors necessary for photosynthesis.
Date posted: May 9, 2018. Answers (1)
- Explain the Factors that affect the rate of photosynthesis(Solved)
Explain the Factors that affect the rate of photosynthesis.
Date posted: May 9, 2018. Answers (1)
- Describe an experiment to Test for starch in a leaf.(Solved)
Describe an experiment to Test for starch in a leaf.
Date posted: May 9, 2018. Answers (1)
- Photosynthesis is a complex process that involves a series of reactions. Explain the two main reactions that are involved in photosynthesis. (Solved)
Photosynthesis is a complex process that involves a series of reactions. Explain the two main reactions that are involved in photosynthesis.
Date posted: May 9, 2018. Answers (1)
- Describe the structure of the chloroplast (Solved)
Describe the structure of the chloroplast
Date posted: May 8, 2018. Answers (1)
- Describe the structure, functions and adaptation of the following parts of a leaf : (a) cuticle (b) epidermis (c) guard cells d) palisade mesophyll(Solved)
Describe the structure, functions and adaptation of the following parts of a leaf :
i) cuticle
ii) epidermis
iii) guard cells
iv) palisade mesophyll
v) Spongy mesophyll layer
vi) Vascular bundle/tissue
Date posted: May 8, 2018. Answers (1)
- Describe the External leaf structure(Solved)
Describe the External leaf structure
Date posted: May 8, 2018. Answers (1)
- What are the importance of photosynthesis? (Solved)
What are the importance of photosynthesis?
Date posted: May 8, 2018. Answers (1)
- Explain the meaning and types of autotrophism (Solved)
Explain the meaning and types of autotrophism
Date posted: May 8, 2018. Answers (1)
- Explain the two modes of nutrition (Solved)
Explain the two modes of nutrition
Date posted: May 8, 2018. Answers (1)
- (i) Define the term nutrition. (ii) Explain how nutrients are useful to living organisms. (Solved)
i) Define the term nutrition.
ii) Explain how nutrients are useful to living organisms.
Date posted: May 8, 2018. Answers (1)
- Discuss the Role of Osmosis in Organisms(Solved)
Discuss the Role of Osmosis in Organisms
Date posted: May 8, 2018. Answers (1)
- Explain the wilting process. (Solved)
Explain the wilting process.
Date posted: May 8, 2018. Answers (1)
- Discuss what would happen if a plant cell is placed in solutions of varying concentrations.(Solved)
Discuss what would happen if a plant cell is placed in solutions of varying concentrations.
Date posted: May 8, 2018. Answers (1)
- Discuss what would happen if an animal cell, say red blood cell is placed in solutions of varying concentrations.(Solved)
Discuss what would happen if an animal cell, say red blood cell is placed in solutions of varying concentrations.
Date posted: May 8, 2018. Answers (1)
- Describe an experiment for the demonstration of Osmosis Using a Visking Tubing.(Solved)
Describe an experiment for the demonstration of Osmosis Using a Visking Tubing.
Date posted: May 8, 2018. Answers (1)
- Describe an experiment for the demonstration of the process of diffusion using potassium manganate (VII).(Solved)
Describe an experiment for the demonstration of the process of diffusion using potassium manganate (VII).
Date posted: May 8, 2018. Answers (1)
- Define the term osmotic potential(Solved)
Define the term osmotic potential.
Date posted: May 8, 2018. Answers (1)
- Explain osmotic pressure(Solved)
Explain osmotic pressure
Date posted: May 8, 2018. Answers (1)