Flashcards
Biology B1.1 C - Secrets of genetic code
Cards in this deck (9)
- 1What are nucleotides made of?+ a common sugar (deoxyribose)
+ a phosphate group
+ a base - 2What are the different bases?+ adenine (A)
+ thymine (T)
+ guanine (G)
+ cytosine (C) - 3How do the bases pair? (base pairing)+ A always pairs w/ T
+ C always pairs w/ G - 4How is DNA copied?1. Weak bonds between bases are unzipped & separated into 2 strands
2. Free nucleotides pair w/ exposed bases, forming new strands
3. Because A always pairs w/ T, the 2 new stands are identical. - 5how does genetic code affect the making of proteins?They determine which amino acids are used to make a protein, & their order. This affects how the polymer folds.
- 6What is a triplet code?The 3 bases on a DNA strand that code for one amino acid.
- 7Where re amino acids joined together to make proteins?@ the ribosomes in the cytoplasm.
- 8What is messenger RNA (mRNA)a single strand of DNA that carries information from the nucleus to the ribosome.
- 9What are the differences between DNA and mRNA?+ mRNA is only 1 strand
+ in mRNA thymine (T) is replaced by uracil (U)
Information
- Description
- GCSE Biology (B1 - You & your genes) Flashcards on Biology B1.1 C - Secrets of genetic code, created by lily bevan on 02/12/2017.
- Created by
- lily bevan
- Views
- 25
- Rating