GCSE AQA Combined Science Biology Paper 1 Questions and Answers 100% Correct

GCSE AQA Combined Science Biology Paper 1 Questions and Answers 100% Correct Gene - Answer️️ -a segment of DNA that determines characteristics of your body How many chromosomes do humans have? - Answer️️ -46 (23 pairs) How many chromosomes do gametes (sex cells) have? - Answer️️ -23 Mitosis - Answer️️ -The process of cell division, resulting in two identical cells The cell cycle - Answer️️ -The cycle of your body's cells dividing in a series of stages How long does the cell cycle take? - Answer️️ -Anywhere from 24 hours to years (depending on the organisms stage of life) Cell division in organisms - Answer️️ -Pre-born baby- quick and constant Child afterbirth- Fairly rapid End of Puberty and Adulthood- slows drastically Stage 1- Cell Cycle - Answer️️ --Longest stage -Grows bigger -Increased mass -Duplicate their DNA -Increase number of ribosomes, mitochondria, etc. for cell divide Stage 2- Cell Cycle - Answer️️ --Mitosis occurs -Organelles get pulled apart and nucleus splits Stage 3- Cell Cycle - Answer️️ --Cytoplasm and Cell membrane split -Two identical daughter cells Cloning - Answer️️ -Producing identical offspring Zygote - Answer️️ -A fused egg and sperm cell embroyonic stem cells - Answer️️ -Inner cells of the embryo Embryo - Answer️️ -One half of the zygote adult stem cells - Answer️️ -An undifferentiated cell of any organism that can rise to many more cells of the same type Problems with embryonic stem cells - Answer️️ --Human rights debate -Slow, expensive, unpredictable -Possibly cause cancer -Potentially infected with viruses Therapeutic cloning - Answer️️ -research using cells from an adult to produce a cloned embryo of themselves Stem call research could possibly treat: - Answer️️ --Spinal cord injuries -Diabetes -Eyesight -Heart damage -Damaged bone and cartilage Tissue - Answer️️ -A group of similar cells that perform the same function. Organs - Answer️️ -Groups of tissues that work together to perform a specific function or related functions Organ system - Answer️️ -group of organs that work together to perform a specific function Organ Systems in our body - Answer️️ -Digestive system, respiratory system, and the circulatory system Levels of organization (small to large) - Answer️️ -cell, tissue, organ, organ system, organism Digestive system - Answer️️ -body system the breaks down food and absorbs nutrients (digestion occurs) Enzymes - Answer️️ -break down large molecules for digestion to