Flashcards
Biology B1.1 B - Genes and proteins
Flashcards do conjunto (16)
- 1What is a gene?A region of DNA
- 2What is the role of genes?They contain the instructions that cells use to make proteins.
- 3What is strange about 98.5% of your DNAFor a long time it was regarded as junk and thought to have no purpose.
- 4What is the believed role of 80% of the 'junk'To control gene expression - when the information in genes is used to make proteins.
- 5What are two types of proteins & what are some examples?Structural - Collagen (a protein found in connective tissues)
Functional - Amylase (an enzyme that speeds up chemical reactions) - 6What are proteins?Polymers made from amino acids.
- 7What are amino acid monomers joined by?They joined together by chemical bonds.
- 8How can amino acids make different proteins?They can arranged in different sequences.
- 9What is phenylketonuria?A disease which prevents the making an enzyme that break down phenylalanine.
- 10Where do you inherit your chromosomes?Half from your mother, & half from your father.
- 11What are 2 copies of a gene called?Alleles.
- 12what is a different version of a gene called.Genetic variant.
- 13What are genetic variants caused by?small changes in DNA.
- 14How do some variants become harmful?They change the shape of the enzyme, which stops it from working.
- 15What is a genotype?the genetic variants that an organism has make up its genotype.
- 16What is an organism's phenotype?The features that result from genes in the DNA.
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- GCSE Biology (B1 - You & your genes) FlashCards sobre Biology B1.1 B - Genes and proteins, criado por lily bevan em 01-12-2017.
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