B3 - Molecules of Life 0.0 / 5 ? ScienceMolecules of LifeGCSEOCR Created by: kaliSereneCreated on: 02-05-16 15:03 What is the role of the Nucleus? Holds chromosomes 1 of 19 What is the role of the Cell Membrane? Contains movement of substances in and out of the cell 2 of 19 What is the role of the Ribosomes? To perform protein synthesis 3 of 19 What is the role of the Cytoplasm? To perform chemical reactions 4 of 19 What is the role of the Mitochondria? The site of respiration 5 of 19 True or false: Ribosomes are smaller than mitochondria. TRUE 6 of 19 What does the amount of mitochondria in a cell depend on? The activity of the cell 7 of 19 What do chromosomes in the nucleus carry? DNA 8 of 19 What is DNA made from? A double helix consisting of bases 9 of 19 What does DNA control the production of? Proteins 10 of 19 What are proteins needed for? Growth and repair 11 of 19 Whom was the structure of DNA first worked out by? Watson and Crick 12 of 19 Why is there such a delay between discovery and winning a prize? Other scientists need to check the discovery to make sure that it's correct 13 of 19 Why do the liver and muscles have large numbers of mitochondria? They are active organs that produce energy 14 of 19 What are genes? Long, coiled molecules of DNA divided up into sections 15 of 19 What do genes contain different sequences of? DNA that codes for different proteins 16 of 19 What are the complementary base pairs? A and T or G and C 17 of 19 What does the base sequence determine? Which amino acids are created and joined to make specific proteins 18 of 19 What is mRNA? Copies the DNA code exactly to make proteins, T is changed to U 19 of 19
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