WorksheetsTopic 1 Molecules and Macromolecules
Total questions: 13
Worksheet time: 7mins
Amino Acids are the building blocks of what macromolecule?
DNA
Proteins
Cellulose
Chromatin
Atomic number (Z) is :
Number of protons minus the number of electrons
The number of protons = number electrons
Number of protons plus neutrons
Total number electrons, protons and neutrons
When outershells are entirely filled, atoms are ....
Unstable
Stable
The most common elements in living organisms are:
Na, Ca, C, O
N, O Ca, S
C, H, N, O
C, H, Na, O
Which one is not an example of INTERmlecular forces
Hydrogen bond
Hydrophobic interaction
Van der Waals interaction
Covalent bonding
A covalent bond is formed when.....
Electrons are passed from one atom to another
Electrons form a delocalised swarm around atoms
Electrons are shared between 2 atoms
Electrons are lost from both atoms
How many electrons share a triple bond?
2
4
6
8
The Ionic bond is formed through electrostatic attraction.
TRUE
FALSE
Water intramolecular forces are covalent bonds between O and H, what bond acts BETWEEN water molecules?
Ionic
Hydrogen
Metal
Van de Waals
Hydrophobic interactions are important in the formation of which organelle?
Nucleus
Chromatin
Biological membranes
The bond or interaction with the most energy (ie strongest is)?
Hydrogen bond
Covalent bond
Ionic interaction
Van der Waals
During Osmosis water molecules move...
from are of high solute concentration to an are of low solute concentration
Freely across in all directions
From an are of low solute concentration to are of high solute concentration
The acidity of a solution is defined by what..
The concentration of H2O+
The concentration of H3O+
The concentration of H3O-
