Flashcards
AQA - Biology II
Cards in this deck (32)
- 1Nucleus is found in which cell. Prokaryotic cells Plant cells only Eukaryotic cellsEukaryotic cells
- 2Permanent vacuole is found in which cell. Prokaryotic cells Plant cells only Eukaryotic cellsPlant cells only
- 3Plasmid is found in which cell. Prokaryotic cells Plant cells only Eukaryotic cellsProkaryotic cells
- 4What are the names of the structuresvacuole
ribosome
cell wall - 5Pic shows onion cells. How should the microscope be adjusted to see the cells on Slide A more clearly.turn the fine focusing knob until the cells are in focus
- 6Pic shows onion cells. How should the microscope be adjusted to see the cells on Slide B more clearly.rotate the objective lens
to a higher power lens - 7—reduced blood flow so less oxygen reaches the heart
the heart muscle cannot respire enough
so the heart muscle does not release enough energy
- 8How does lifestyle risk factors increase the chance of developing CHD.• SMOKING – high bp / cholesterol / fatty deposition
• OBESITY – lack of exercise / high bp / cholesterol / fatty, deposition / diabetes
• ALCOHOL – bp / cholesterol - 9What is the balanced equation for photosynthesis?
- 10What type of reaction is photosynthesis? Aerobic Endothermic Exothermic OxidationEndothermic
- 11Vaccinating a large proportion of the population against the measles virus reduces the spread. Explain why.most people are immune so do not become ill from infection.
less chance of unvaccinated individuals being exposed to the measles virus - 12This question is about stem cells. Give one place in a plant where stem cells are found.• tip of shoot
• tip of root - 13What is one economic use of plant stem cells? To create genetically modified crops To create new species of plants To increase variation in plants To produce large numbers of identical plantsto produce large numbers of identical plants
- 14Scientists have recorded the date migrating birds arrived at the breeding grounds. The records show that for every 1 °C increase in mean global temperature, the birds arrived one day earlier. What will the birds be competing for when they arrive at their UK breeding grounds? 0 1 . 2 Tick two boxes.Food
Mates - 15Global temperatures are increasing every year. This is because of an increase of greenhouse gases in the atmosphere. Name two greenhouse gases.• carbon dioxide
• methane - 16Global warming affects the migration of animals. Give one other effect of global warming.• rising sea levels
• extinction of some species
• habitat loss - 17Which two human activities cause global warming? Burning fossil fuels Eating vegetables Farming cows Turning off lights Using too much waterburning fossil fuels
farming cows - 18Which gas in the atmosphere causes acid rain? Carbon monoxide Oxygen Ozone Sulfur dioxidesulfur dioxide
- 19Genetic material in cells is made of DNA. Which two of the following describe the structure of DNA? A double helix A monomer A polymer A protein A single stranda double helix
a polymer - 20A small section of DNA which codes for one protein is called a _______gene
- 21All the genetic material of an organism is called its _______genome
- 22Gametes (sex cells) contain half the amount of DNA compared to body cells. Give the names of the two types of gametes in humans.sperm and eggs
- 23What is the process called when the gametes join?fertilisation
- 24Which two features show that this cell division is meiosis and not mitosis?• the cell divides twice
• the new cells have half the number of chromosomes
- 25Which label is the cell nucleus?A
- 26Which label is the receptor?D
- 27shows the nerve pathway when a person touches a sharp pin. When the finger touches the sharp pin, the muscle in the arm contracts to pull the arm away. What type of action is this?a reflex action
- 28Pic shows position of some glands which release hormones. Which is the pituitary gland?A
- 29Luteinising hormone (LH) is a hormone released by the pituitary gland. What is the function of LH?controls the release of an egg
- 30How does LH travel from the pituitary gland to its target organ?in the blood(stream)
- 31What is the scientific term used for the child’s eye colour? Chromosome Condition Genotype Phenotypephenotype
- 32What effect will a mutation have? Almost certainly have no effect Definitely change appearance Definitely be passed on to all children Probably cause a diseasealmost certainly have no effect