AQA GCSE Biology - Higher Tier - B2 Questions & Answers

Cellulose - ANSWERSWhat is a cell wall made from? Absorb light energy (for photosynthesis) - ANSWERSRole of chloroplasts Cell sap - ANSWERSWhat does a permanent vacuole contain? Simple aquatic organisms - ANSWERSWhat are algae? Cytoplasm - ANSWERSWhere is genetic material held in bacteria? Contains visual pigment so you can see in colour - ANSWERSHow is a cone cell specialised? They can carry impulses from receptors to the CNS - ANSWERSHow are neurons specialised? A group of cells with similar structure and function - ANSWERSTissue Muscle, glandular, epithelial - ANSWERS3 types of animal tissue Epidermal, mesophyll, xylem, phloem - ANSWERS4 types of plant tissue Leaf, stem, root - ANSWERS3 plant organs Iodine test for starch - ANSWERSTest for photosynthesis Blue-black - ANSWERSColour in the test for photosynthesis which shows photosynthesis has occured Storage (as insoluble starch/ fats and oils), respiration, cellulose production (strengthens cell walls), protein production - ANSWERS4 ways plants use glucose Growth (protein production) - ANSWERSHow do plants use nitrate ions? Photosynthesis - ANSWERSHow do plants use magnesium ions? Temperature, (availability of) nutrients, (amount of) light, (availability of) water, (availability of) oxygen, (availability of) carbon dioxide - ANSWERS6 factors effecting the distribution of organisms When all possible variables are controlled - ANSWERSHow would an investigation be valid? When the original investigator repeats the experiment using the same method and equipment and obtains the same results - ANSWERSHow would an investigation be repeatable? When the investigation is repeated by another person (or different equipment is used) and the same results are obtained - ANSWERSHow would an investigation be reproducible? When the variation between the values are small - ANSWERSWhen is an investigation reliable? The quality of the measuring apparatus - ANSWERSWhat does accuracy depend on? How near a measurement is to the true value - ANSWERSWhat is accuracy? The degree to which several measurements provide answers very close to each other - ANSWERSWhat is precision? Random quantitative sampling, Sampling along a transect - ANSWERS2 ways quantitative data can be obtained Tissue, hormones, antibodies, catalysts - ANSWERS4 things proteins can be Salivary glands, pancreas, small intestine - ANSWERSPlacse where amylase is produced Mouth, small intestine - ANSWERSWhere does amylase work? Stomach, pancreas, small intestine - ANSWERSPlaces where protease is produced Stomach, small intestine - ANSWERSWhere does protease work? Pancreas, small intestine - ANSWERSPlaces where lipase is produced Liver - ANSWERSWhere is bile produced? Gall bladder - ANSWERSWhere is bile stored? Neutralises stomach acid in the small intestine - ANSWERSRole of bile