Science OCR Gateway B flashcards - B3, C3, P3 - Molecules of life 0.0 / 5 ? ScienceB3, C3, P3GCSEOCR Created by: charliem10132Created on: 11-05-16 17:29 What is mitochondria? Structures in the cytoplasm of all cells where respiration takes place. 1 of 18 What is respiration? The chemical reaction that releases energy from glucose. 2 of 18 Where does respiration occur? In mitochondria. 3 of 18 What tissues and organs need a lot of energy, thus needing more mitochondria? Liver cells, muscles cells 4 of 18 What is the cytoplasm? Living substance inside the cell. 5 of 18 What are ribosomes the site of? Protein synthesis. 6 of 18 What are chromosomes? Long, coiled molecules of DNA, divided up into regions called genes. 7 of 18 What does the genetic code control? Cell activity, thus can control some characteristics of the organism. 8 of 18 What does DNA control? Production of different proteins, needed for cell growth and repair 9 of 18 Which two scientists worked out the structure of DNA? James Watson and Francis Crick. 10 of 18 What are the four types of complementary base pairings? A, T, C and G. 11 of 18 What do the two strands of DNA coil together to form? A double helix. 12 of 18 What does each gene in a molecule of DNA contain? (Two points) 1. A different sequence of bases. 2. Codes for particular proteins. 13 of 18 As genes cannot leave the nucleus, so what happens in order for protein to be made? There is a copy made which is able to leave the nucleus. This then leaves the nucleus and goes to the cytoplasm in order for protein to be formed. 14 of 18 How is protein coded? By the structure of three bases. 15 of 18 What is the code GGT and TCA found in? GGT is found in glycine and TCA is found in serine. 16 of 18 What is mRNA from DNA called? Transcription. 17 of 18 What is proteins from mRNA called? Translation. 18 of 18
GCSE Biology B6- OCR 21st century Science Printable revision cards 5.0 / 5 based on 1 rating Teacher recommended
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