biology 0.0 / 5 ? BiologyDNA and inheritanceGCSEAll boards Created by: millxxie04Created on: 30-07-18 01:31 describe cytoplasm - where chemical reactions take place. 1 of 28 describe a cell membrane - allows movement into and out of the cell. 2 of 28 describe the nucleus - contains the genetic information and controls what the cell does. 3 of 28 where are ribosomes located in the cell ? - ribosomes are in the cytoplasm. 4 of 28 including cytoplasm and the nucleus, what else is generally found in a cell ? - mitochondria. 5 of 28 what is the use of mitochondria ? - to produce energy to swim. 6 of 28 inside the nucleus of every cell they is .. what ? - chromosomes. 7 of 28 what is the function of chromosomes ? - to carry genetic information in the form of genes. 8 of 28 chromosomes including the nucleus of each cell contains .. what ? - a complete set of genetic codes/instructions. 9 of 28 How is the genetic codes carried ? - they are carried by genes on chromosomes. 10 of 28 describe the formation of chromosomes - they are long coiled molecules of DNA. 11 of 28 what chemical is genes made of ? - DNA ( deoxyribonudeic acid ). 12 of 28 how many pairs of chromosome are in an average cell ? - 23 pairs. 13 of 28 what does DNA control ? - the production of proteins. 14 of 28 what is the formation of a DNA molecule ? - its made of two strands coiled around each other in a double helix (spiral). 15 of 28 name the 4 bases found in a DNA molecule ? - A,C,G AND T. 16 of 28 name the base complentary pairing in a DNA molecule ? - A pairs with T, C pairs with G. 17 of 28 describe the cell division (mitosis) ? - mitosis is when a cell reproduces itself by splitting from two identical off spring. 18 of 28 what is mitosis used for ? - when plants/animals want to grow or to replace cells that have been damaged. 19 of 28 what does meosis produce ? - four haploid cells whose chromsomes are not identical. 20 of 28 in humans where does a human use meosis ? - in the reproductive organs (ovaries and testes). 21 of 28 what is a gene ? - a gene is a short length of the chromsome. 22 of 28 name the three sources of genetic variation - - gamete formation - fertilisation - mutations - . 23 of 28 describe what gamete formation - making sperm and egg cells. 24 of 28 describe fertilisation - the gametes join together. 25 of 28 describe mutations - changes to the genetic code. 26 of 28 describe the nervous system - its what lets you react to what goes on around you. 27 of 28 name the five different sense organs - eyes , ears , nose , tongue and skin. 28 of 28
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