QCAA Study guides, Class notes & Summaries

QCAA Cognitive Verbs Exam Studyguide ...

QCAA Biology Unit 1 and 2 Exam Questions and answers, rated A+ explain, using an example, how the arrangement of internal membranes can control biochemical processes - -- the inner membrane folds and creases itself to expand then amount of surface area it has - this is called the cristae - this means there is a greater area for enzymes to work and cause reactions explain how biochemical processes are controlled and regulated - -- enzymes are catalysts - enzymes are proteins folded and ...

QCAA chemistry Unit 4 Topic 1: Properties and structure of organic materials, Questions and answers/ What are the two types of structural isomers? Positional isomer: Where a functional group is bonded at different locations on an organic molecule. Chain isomer: Where an organic molecule contains branching. A geometric isomer is a type of ______isomer Stereoisomer What is a geometric isomer? A molecule with the same structural formula but with different arrangement of atoms in space as...

QCAA ATAR Biology Questions and answers, rated A+ 10% - -Only ______ of the energy is transferred from one level to another. Energy is lost through: -heat -metabolic processes -waste (faeces) Abiotic factors - -Nonliving components of environment: -climate -temp -O2/CO2 conc -soli pH Abundance - -The number of individuals in each species acceleration phase - -When growth rate is faster because there are: -greater numbers of individuals to produce increasingly more offspring ac...

QCAA Biology Unit 3&4 Questions and answers, graded A+ Carrying Capacity definition - -the size of the population that can be supported undefinedly on the available resources and services of that ecosystem. Polygenetic Inheritance definition - -when one characteristics is controlled by 2 or more genes Keystone species definition - -a plant or animal that plays a unique and crucial role in the way an ecosystem functions gene definition - -region/s of DNA that are made up of nucleotides;...

QCAA ATAR BIOLOGY UNIT 3 Questions and answers, VERIFIED/ Ecosystems - -a biological community of interacting organisms and their physical environments Limiting factor - -any biotic or abiotic factor that restricts the existence of organisms in a specific environment. examples include: the amount of water, amount of food, temperature, amount of space and availability of mates Hierarchical classification - -Arranging things into groups according to their similarities from larger genera...

QCAA chemistry Questions and answers, rated A+ acid-base indicator - -a chemical dye whose colour is affected by acidic and basic solutions Acids are - -proton (H+) donors activation energy - -the minimum amount of energy required to start a chemical reaction Addition of potassium dichromate(VI) solution acidified with dilute sulphuric acid to primary, secondary and tertiary alcohols will see a colour change for which (after heating)? - -primary and secondary alcohols. No change for te...

BIOLOGY UNIT 3 AND 4 QCAA. Exam Review Questions and answers, rated A+ Explain how environmental factors limit the distribution and abundance of species in an ecosystem. Limiting factors are aspects of the environment that restrict an organism's ability to live there. Limiting factors can be biotic, such as species interactions, food, and water or abiotic, such as light intensity, and climate. The distribution of species is limited by their ability to access adequate food sources and ...

UNIT 3 - QCAA Exam questions and answers, rated A+ 3.1.1.a - recognise that biodiversity includes - -the diversity of species, habitats and ecosystems. 3.1.1.b - determine diversity of species using measures such as species evenness (relative species abundance) which is a measure of - -the population size of a particular species relative to the population size of other species within the community 3.1.1.b - determine diversity of species using measures such as species percentage cover w...

Chemistry Year 11/12 unit 3 datatest review qcaa. Questions and answers. -log [H+] - -pH formula (in booklet) -log [OH-] - -pOH formula (on booklet) [products]^n/[reactants]^n where n is coefficient (did u know this is on page 1 of the formula booklet) - -Equilibrium constant equation 7 - -Strong acid + strong base, pH = ? 10^-pH - -[H+] formula (not in booklet ) 10^-pOH - -[OH-] formula (not in booklet) 14 - -pH + pOH = 22.4L/mol - -stp 24.5L/mol - -rtp vol/mol above - -base has pH...