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WorksheetsQCAA-Biology all topics
Total questions: 61
Worksheet time: 31mins
What is the structure of DNA?
Single-stranded molecule
Double-stranded molecule
Triple-stranded molecule
Quadruple-stranded molecule
Which enzyme is involved in the unwinding of the double helix during DNA replication?
DNA polymerase
Helicase
Ligase
Primase
What type of bonds exist between DNA strands?
Covalent bonds
Ionic bonds
Weak, base-specific hydrogen bonds
Metallic bonds
What is the role of homologous chromosomes during meiosis?
They do not play any role
They are involved in the process of crossing over and recombination
They are responsible for DNA replication
They are involved in protein synthesis
What is the difference between spermatogenesis and oogenesis?
Spermatogenesis occurs in females, and oogenesis occurs in males
Spermatogenesis produces diploid cells, and oogenesis produces haploid cells
Spermatogenesis produces haploid cells, and oogenesis produces diploid cells
Spermatogenesis produces haploid cells, and oogenesis produces haploid cells
What is the significance of independent assortment and random fertilization?
They do not affect genetic variation
They reduce genetic variation
They increase genetic variation in the genotype of offspring
They eliminate genetic variation
What are the two types of DNA mentioned in the learning material?
Coding and noncoding DNA
Functional and nonfunctional DNA
Transcribed and untranslated DNA
Active and inactive DNA
What is the process of transcription in protein synthesis?
Conversion of mRNA into amino acids
Transcription of a gene into messenger RNA in the nucleus
Translation of mRNA at the ribosome
Binding of proteins to specific DNA sequences
What is the purpose of gene expression?
To replicate DNA
To synthesize a functional gene product
To mutate genes
To inhibit protein synthesis
Which of the following is NOT a factor that regulates the phenotypic expression of genes?
During transcription and translation
Through the products of other genes
Via environmental exposure
By the process of DNA replication
What is an example of a transcription factor gene that regulates morphology and cell differentiation?
HOX transcription factor family
RNA polymerase
DNA helicase
Ribosomal RNA
Which of the following is NOT a cause of mutations in genes and chromosomes?
A. DNA replication errors
B. Cell division errors
C. Exposure to mutagens
D. Proper DNA repair mechanisms
What is an example of aneuploidy?
A. Sickle cell anemia
B. Trisomy 21
C. Cystic fibrosis
D. Hemophilia
Which tool is used to predict a genetic disorder from given data?
A. DNA sequencing
B. Human karyotype
C. PCR
D. Gel electrophoresis
What is the purpose of polymerase chain reaction (PCR)?
A. To cut DNA at specific sites
B. To amplify DNA
C. To join DNA fragments
D. To sequence DNA
What is the role of DNA ligase in recombinant DNA technology?
A. To cut DNA
B. To insert DNA fragments
C. To join DNA fragments
D. To amplify DNA
What does polygenic inheritance refer to?
A. Inheritance of a trait controlled by a single gene
B. Inheritance of a trait controlled by multiple genes
C. Inheritance of a trait controlled by mitochondrial DNA
D. Inheritance of a trait controlled by sex chromosomes
Which of the following is an example of a current genetic biotechnology technique?
A. DNA replication
B. Gel electrophoresis
C. Protein synthesis
D. Cell division
What is the role of bioinformatics in biological research?
To create new species of organisms
To analyze relationships in biological data
To develop new pharmaceuticals
To conduct physical experiments
What potential do genetically modified organisms (GMOs) have?
They can be used to create new species
They have potential for advancement in agriculture and pharmaceuticals
They can replace natural organisms
They are used only for laboratory experiments
What is the term used to describe the increase in taxonomic diversity or morphological disparity over time?
Microevolution
Macroevolution
Evolutionary radiation
Genetic drift
Which of the following is NOT one of the main processes of microevolutionary change?
Mutation
Gene flow
Genetic drift
Natural selection
What is the ultimate source of genetic variation?
Natural selection
Genetic drift
Mutation
Gene flow
Which type of selection occurs when environmental pressures confer a selective advantage on a specific phenotype?
Stabilising selection
Directional selection
Disruptive selection
Natural selection
What are the three main types of phenotypic selection?
Stabilising, directional, and disruptive
Stabilising, genetic, and disruptive
Directional, genetic, and stabilising
Disruptive, genetic, and directional
Which of the following is NOT a mode of speciation?
Allopatric
Sympatric
Parapatric
Symbiotic
What is the increased risk faced by populations with reduced genetic diversity?
Increased gene flow
Increased risk of extinction
Increased habitat fragmentation
Increased reproductive isolation
Which of the following is NOT a pattern of diversification between species?
Divergent
Convergent
Parallel
Symbiotic
What should be referred to in terms of natural and human causes in the context of speciation?
Gene flow
Habitat fragmentation
Allele frequency
Genetic diversity
Which subject matter will not be assessed on the external examination but could be used in the development of claims and research questions for research investigation?
Speciation and macroevolution
Science as a Human Endeavour (SHE)
Genetic diversity
Habitat fragmentation
What technological developments enable the identification of further evidence for evolutionary relationships?
Comparative genomics, comparative biochemistry, and bioinformatics
Gene flow and allele frequency data
Modes of speciation
Patterns of diversification
Which of the following is included in the concept of biodiversity?
A. Diversity of species and ecosystems
B. Only the diversity of species
C. Only the diversity of ecosystems
D. Diversity of physical features
What is used to measure the diversity of species?
A. Species richness, evenness, percentage cover, percentage frequency, and Simpson’s diversity index
B. Only species richness
C. Only percentage cover
D. Only Simpson’s diversity index
Which factors are considered in species diversity indices?
A. Species interactions and abiotic factors
B. Only species interactions
C. Only abiotic factors
D. Physical features and molecular sequences
What is the formula used to quantify biodiversity of a habitat according to Simpson’s diversity index (SDI)?
A. SDI = 1 - (Σ(n(n-1))/N(N-1))
B. SDI = 1 - (Σ(N(N-1))/n(n-1))
C. SDI = Σ(n(n-1))/N(N-1)
D. SDI = Σ(N(N-1))/n(n-1)
What does the term "clade" refer to in biological classification?
A. A group of organisms that includes a common ancestor and all its descendants
B. A group of organisms with similar physical features
C. A group of organisms with similar methods of reproduction
D. A group of organisms with similar molecular sequences
Which system is used for the classification of organisms based on physical features?
A. The Linnaean system
B. The Simpson’s diversity index
C. The molecular phylogeny
D. The Simpson’s index
Which of the following is an example of an interspecific hybrid that does not produce fertile offspring?
Horse
Mule
Donkey
Zebra
What is the purpose of stratified sampling in ecosystem studies?
To estimate population density and distribution
To identify individual species
To measure the height of trees
To count the number of leaves
Which of the following is NOT a factor to consider in the process of stratified sampling?
Site selection
Minimising bias
Counting criteria
Measuring leaf size
What is the role of technology in biodiversity protection?
To increase the number of species
To measure and monitor populations
To decrease the size of ecosystems
To eliminate invasive species
Which classification system could be used for classifying ecosystems?
Holdridge life zone classification scheme
Linnaean classification system
Mendelian inheritance system
Darwinian evolution system
What is the primary focus of setting agreed biodiversity targets?
To increase the number of species in an ecosystem
To achieve positive international action towards biodiversity conservation
To reduce the number of predators in an ecosystem
To increase the biomass of producers
Which of the following is NOT a component of energy transfer within ecosystems?
Loss of energy through radiation, reflection, and absorption
Efficiencies of energy transfer from one trophic level to another
Conversion of light to chemical energy
Production of biomass
What should be used to develop scientific skills and collect data in the study of ecosystems?
Laboratory experiments
Fieldwork
Computer simulations
Theoretical models
What is the term used to describe the role of a species in terms of habitat, feeding relationships, and interactions with other species?
Keystone species
Ecological niche
Trophic level
Biogeochemical cycle
What is the suggested practical activity to test the competitive exclusion principle hypothesis?
Measure the wet biomass of producer samples
Study the abundance of each trophic level in a simple food chain
Study vertical zonation on a tree
Carry out a longitudinal study of a keystone species
What is the term used to describe the maximum population size that an environment can sustain indefinitely?
Carrying capacity
Population density
Biotic potential
Ecological footprint
Which of the following is NOT a biotic factor that limits population growth?
Competition for resources
Predation
Disease
Availability of nutrients
What formula is used to estimate population size using the capture-recapture method?
Lincoln index
Simpson's index
Shannon index
Mark-recapture index
Which of the following is an example of an abiotic factor that can limit population growth?
Predation
Disease
Space availability
Competition for resources
What is the primary difference between primary and secondary succession?
Primary succession occurs in an area with no previous soil, while secondary succession occurs in an area with existing soil.
Primary succession occurs in aquatic environments, while secondary succession occurs in terrestrial environments.
Primary succession involves only plant species, while secondary succession involves both plant and animal species.
Primary succession is faster than secondary succession.
Which of the following features is NOT characteristic of pioneer species?
Ability to fixate nitrogen
Tolerance to extreme conditions
Slow germination of seeds
Ability to photosynthesize
What is the impact of human activity on the reduction of biodiversity and ecosystem change?
It increases the speed of ecosystem recovery.
It reduces the magnitude of ecosystem change.
It leads to habitat destruction and overexploitation.
It has no significant impact.
How can Aboriginal knowledge and Torres Strait Islander knowledge contribute to ecosystem conservation?
By providing data for understanding ecosystem dynamics
By developing new species
By eliminating abiotic elements
By reducing biodiversity
What is the role of scientific knowledge in marine reserves?
To eliminate marine species
To analyze unique factors affecting ecosystems
To increase pollution levels
To reduce the number of marine reserves
Why are keystone species important in conservation strategies?
They can be more effective in maintaining complex ecosystem dynamics
They reduce the need for conservation of other species
They increase the number of abiotic elements
They decrease biodiversity
What is the primary function of ribosomes in a cell?
DNA replication
Protein synthesis
Energy production
Cell division
Which of the following processes is an example of genetic recombination?
Transcription
Translation
Crossing over
Replication
A
B
C
D
A
B
C
D
