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WorksheetsMolecules of Life 2021 (MS22)
Total questions: 20
Worksheet time: 15mins
Water is a versatile solvent due to its
low viscosity.
polar molecules.
high specific heat.
high boiling point.
At what temperature is water at its densest?
0°C
4°C
36°C
100°C
Which of the following characteristics of water are essential for the proper functioning of tissue fluid?
I. Water has low viscosity
II. Water has high surface tension
III. Water has maximum density at 4ºC
I only
I and II
II and III
I, II and III
Which of the following is TRUE of both starch and cellulose?
they are both polymers of glucose.
they are both used for storing energy in plants.
they are both used for structure in plant cells.
they both make up a considerable part of the plasma membrane.
Why are phospholipids important to cell structure?
phospholipids are part of DNA.
phospholipids contain fatty acid.
phospholipids have a polar and non-polar end.
phospholipids are found only in animals.
Which of the following statements does NOT describe a function of lipids?
an electric insulator.
a thermal insulator.
a source rich in energy.
forms parenchyma cell walls.
The unique characteristic of each amino acid is determined by
the type of peptide bond.
its position on the polypeptide chain.
its amino group.
its R group
The phosphodiester linkage in DNA or RNA is formed between
two nitrogenous bases.
two pentose sugars.
a pentose sugar and a nitrogenous base.
a pentose sugar and a phosphate group.
If there are 23 nucleotides with Adenine in DNA molecule, how many nucleotides with Guanine?
23
47
54
27
The scientists who proposed the double helix model of DNA are
Singer and Nicholson
Watson and Crick
Meselson and Stahl
Jacob and Monod
