ALL 1
Carbohydrates
Lipids
Water
All 2
100
What elements are common to all 4 biomolecules?
Carbon, Hydrogen, Oxygen
100
What is the monomer for carbohydrates?
monosaccharide
100
What are two functions of lipids?
Insulator, energy
100
A water molecule is polar because...
one end is positive and one end is negative
100
What type of bond is this?
hydrogen bond
200
Which biomolecule is found in fats, oils, and waxes and is a source of long-term energy?
Lipids
200
Name the structure
Cellulose
200
The components shown here which make up a lipid. These are?
1 glycerol and 3 fatty acid chains
200
The property or properties of water most responsible for this is/are?
cohesion and adhesion
200
Which of the following compounds may be polymers?
All
300
Which biomolecule is a main source of quick energy?
Carbohydrate
300
Differentiate between amylose and amylopectin
Amylose is simply poly-(1-4) glucose, so is a straight chain. In fact the chain is
floppy, and it tends to coil up into a helix.
Amylopectin is poly(1-4) glucose with about 4% (1-6) branches. This gives it a
more open molecular structure than amylose.
300
What type of bonding happens to form a triglyceride?
Ester
300
The film of water under the bug is best created by:
Hydrogen bonds
300
An organic compound with a ratio of about 2 hydrogen atoms and one oxygen atom for each carbon atom is a(n)
Carbohydrate
400
When molecules of glucose and fructose combine to form sucrose, they do so by ___
a. electron clouds
b. dehydration synthesis
c. hydrolysis
d. radiation
b. dehydration synthesis
400
Is starch made up of alpha or beta glucose?
alpha
400
State three properties of saturated fatty acids
Contain only single C–C bonds
Closely packed
Strong attractions between chains
High melting points
Solids at room temperature
400
The tightness across the surface of water that enables paper clips to float is ____________.
surface tension
400
How does water move from the roots to the leaves of plants?
Capillary action, cohesion
500
What differentiates a triglyceride from a phospholipid? and give one function of each.
Triglycerides have glycerol and three fatty acids, phospholipids have glycerol, two fatty acids and a phosphate. group.
500
Is sucrose a reducing or non-reducing sugar?
What is the nutrient test for this called and the reagent/s used? andddddd
what colour change would be present if a substance tested present for sucrose?
Non-reducing
Benedicts Test
HCL and benedicts solution
Brick-red
500
Phospholipids have two main function what are they? and describe the structure of a glycolipid.
Membrane structure
Transport of fat between gut and liver.
Glycolipids are lipids with a carbohydrate attached by a glycosidic bond/a hydrophobic lipid tail and one or more hydrophilic sugar groups
500
Why can water have no net charge but have slight charges in different parts of the molecule?
The oxygen end is slightly negative and the hydrogen end is slightly positive
500
State 3 properties of unsaturated fatty acids
Contain one or more double C=C bonds
Nonlinear chains do not allow molecules to pack closely
Few interactions between chains
Low melting points
Liquids at room temperature