Question 1

Why does sucrose dissolve readily in water?

Accepted Answer

A)  Because water molecules form H-bonds with the hydroxyl groups in sucrose. 
B)  Because sucrose is non-polar. 
C)  Because sucrose molecules are unable to form H-bonds with water molecules. 
D)  Because sucrose is an efficient solvent. 
E)  Because sucrose is hydrophobic. 
A)  Because water molecules form H-bonds with the hydroxyl groups in sucrose. 
B)  Because sucrose is non-polar. 
C)  Because sucrose molecules are unable to form H-bonds with water molecules. 
D)  Because sucrose is an efficient solvent. 
E)  Because sucrose is hydrophobic.

Question 2

Why is Nitrogen fixation an energy intensive process?

Accepted Answer

A)  NH3 synthesis contains a rate-limiting step in its production. 
B)  Atmospheric N contains long Carbon chains that are difficult to break down. 
C)  N-fixation is a recently evolved mechanism and therefore inefficient. 
D)  Atmospheric N contains several single and double bonds. 
E)  Atmospheric N is bound by a triple covalent bond. 
A)  NH3 synthesis contains a rate-limiting step in its production. 
B)  Atmospheric N contains long Carbon chains that are difficult to break down. 
C)  N-fixation is a recently evolved mechanism and therefore inefficient. 
D)  Atmospheric N contains several single and double bonds. 
E)  Atmospheric N is bound by a triple covalent bond.

Exam 1: Nature of Molecules

Why does sucrose dissolve readily in water?

Why is Nitrogen fixation an energy intensive process?

Biomolecules

The Chemistry of Life

Functioning Cells

Movement Across Membranes

Harvesting Energy

Cells, Tissues and Signals

Cell Division

Inheritance

Genes, Chromosomes and Dna

The Genetic Code

Gene Expression

Genomes, Mutation and Cancer

Viruses

Genetic Engineering and Biotechnology

Reproduction, Growth and Development of Flowering Plants

Structure of Plants

Plant Nutrition, Transport and Adaptation to Stress

Plant Hormones and Growth Responses

Animal Reproduction

Animal Development

Homeostasis: Water, Solutes and Excretion

Gas Exchange in Animals

Circulation

Metabolism, Temperature Regulation and Environmental Stress

Animal and Human Nutrition

Innate Defences and the Immune System

Hormonal Control in Animals

Nervous Systems

Animal Movement

Animal Behaviour

Evolving Life

Evolving Earth

Mechanisms of Evolution

Bacteria

The Protists

Plants

Fungi

Simple Animals: Sponges to Flatworms

Annelids, Molluscs, Nematodes and Arthropods

Echinoderms and Chordates

Australian Biota

Population Ecology

Living in Communities

Ecosystems

Human Impacts

Filters