Question 1

Vernalisation is

Accepted Answer

A)  the increase in plant growth rate correlating with increased temperature. 
B)  the metabolic changes for adaptation to low temperature. 
C)  the induction of flowering by low temperature. 
D)  the production of leaf pigments to enable them to detect changes in light. 
E)  the bending of plant stems in response to light. 
A)  the increase in plant growth rate correlating with increased temperature. 
B)  the metabolic changes for adaptation to low temperature. 
C)  the induction of flowering by low temperature. 
D)  the production of leaf pigments to enable them to detect changes in light. 
E)  the bending of plant stems in response to light.

Question 2

Cytokinins are plant hormones that are thought to

Accepted Answer

A)  stimulate cell elongation but not cell division. 
B)  be involved in control of lateral branch growth and leaf senescence. 
C)  be growth inhibitors. 
D)  stimulate root growth. 
E)  only occur in the flowering plants. 
A)  stimulate cell elongation but not cell division. 
B)  be involved in control of lateral branch growth and leaf senescence. 
C)  be growth inhibitors. 
D)  stimulate root growth. 
E)  only occur in the flowering plants.

Question 3

Auxins, gibberellins, cytokinins, abscisic acid and ethylene are

Accepted Answer

A)  five main groups of plant hormones. 
B)  five metabolic toxins commonly used in commercial herbicides. 
C)  toxic compounds produced by plants to deter predators. 
D)  five lesser plant hormones. 
E)  compounds used to ripen fruit. 
A)  five main groups of plant hormones. 
B)  five metabolic toxins commonly used in commercial herbicides. 
C)  toxic compounds produced by plants to deter predators. 
D)  five lesser plant hormones. 
E)  compounds used to ripen fruit.

Question 4

Which of the following growth responses is found in plant cells exposed to auxins?

Accepted Answer

A)  Increased respiration rate. 
B)  Increased ATP-ADP ratio. 
C)  Decreased membrane potential. 
D)  Decreased K+ uptake. 
E)  Increased Ca2+ uptake. 
A)  Increased respiration rate. 
B)  Increased ATP-ADP ratio. 
C)  Decreased membrane potential. 
D)  Decreased K+ uptake. 
E)  Increased Ca2+ uptake.

Question 5

You have been asked to assist in trying to regenerate a recently logged area of forest. One of the tasks in this role is to try to encourage the germination of native seeds already present in the soil seedbank that typically only sprout after a fire. How might you produce the desired result, without further damaging or disturbing the area of forest in question?

Accepted Answer

A)  Set fire to the remaining plant material left behind after the logging 
B)  Dig up all the soil and manually retrieve seeds present before exposing them to wood smoke and replanting and germinating seeds 
C)  Apply kinophosphatidin to bind to butenolide recepetors 
D)  Use karrikin to induce seed germination 
E)  Spray the area with a mix of hormones including cytokinins, ABA and auxin 
A)  Set fire to the remaining plant material left behind after the logging 
B)  Dig up all the soil and manually retrieve seeds present before exposing them to wood smoke and replanting and germinating seeds 
C)  Apply kinophosphatidin to bind to butenolide recepetors 
D)  Use karrikin to induce seed germination 
E)  Spray the area with a mix of hormones including cytokinins, ABA and auxin

Exam 19: Plant Hormones and Growth Responses

Vernalisation is

Cytokinins are plant hormones that are thought to

Auxins, gibberellins, cytokinins, abscisic acid and ethylene are

Which of the following growth responses is found in plant cells exposed to auxins?

Nature of Molecules

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

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

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