Flashcards
B3a- Molecules of Life
Flashcards do conjunto (17)
- 1What is the job of the cell membrane??To control movement into and out of the cell.
- 2What does the nucleus control and contain??It contains the genetic informaton and controls what the cell does.
- 3Where does respiration take place??In the mitochondria.
- 4What takes place in the cytoplasm??Most chemical reactons. It may contain mitochondria, which is where most energy is released in respiration.
- 5What does a typical animal cell look like??
- 6What are the typical features of an animal cell??Cell membrane, cytoplasm, nucleus, membrane, ribosome, mitochondria.
- 7Why do liver and muscle cells have particularly large numbers of mitochondria??Because they have a high energy requirement.
- 8What is the 'genetic code'??A complete set of genetic instructions found in the nucleus of each cell.
- 9What does the genetic code control??Cell activity and therefore some characteristics of the whole organism.
- 10Describe the structure of a DNA molecule.2 strands coiled around eachother in double helix; bases bond in pairs to form cross-links.
- 11When was the structure of DNA first put forward and by whom??1953: James Watson & Francis Crick, used data from X-ray crystallography by Rosalind Franklin.
- 12Where are proteins made??In the cytoplasm.
- 13What is meant by complimentary base pairing??A bonds with T and C bonds with G on opposite strands of the DNA molecule.
- 14A group of how many bases represents one amino acid in a protein chain??Three.
- 15Proteins are synthesised by structures called what??Ribosomes.
- 16What is the name given to the messenger molecule involved in protein synthesis??It is called mRNA.
- 17Watson and Crick's discovery led to what??An explosion of scientific advances including genetic engineering and mapping the human genome.
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- gcse Biology FlashCards sobre B3a- Molecules of Life, criado por k m em 29-01-2014.
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