AQA GCSE Biology Cell Biology Exam Questions with Complete Solutions

Eukaryotic cells - ANSWER-Plant and animal cells What characteristics eukaryotic cells? (3) - ANSWER-Cell membrane, cytoplasm and genetic material enclosed in a nucleus Prokaryotic cells - ANSWER-Bacterial cells What characteristics prokaryotic cells? (4) - ANSWER-1. much smaller in comparison 2. have a cytoplasm and cell membrane surrounded by cell wall 3. genetic material is a single DNA loop not enclosed in a nucleus 4. may be 1 or more small rings of DNA called plasmids Millimetre - ANSWER-mm, thousandth of a metre, 10^-3m Micrometre - ANSWER-μm, millionth of a metre, 10^-6m Nanometre - ANSWER-nm, billionth of a metre, 10^-9m Nucleus - ANSWER-Contains genetic information and controls cell's activities Cell membrane - ANSWER-Controls the passage of substances in and out of the cell e.g. glucose and ions Cytoplasm - ANSWER-Where most chemical reactions take place Ribosomes - ANSWER-Where protein synthesis takes place Mitochondria - ANSWER-Where aerobic respiration takes place Chloroplasts - ANSWER-Where photosynthesis occurs because contain chlorophyll (in plant cells) Plasmids - ANSWER-Small rings of DNA which code for very specific features such as antibiotic resistance (in bacterial cells) Most animal cells have... (5) - ANSWER-1. Nucleus 2. Cytoplasm 3. Cell membrane 4. Mitochondria 5. Ribosomes