Biology B1.1 C - Secrets of genetic code

Question	Answer
What are nucleotides made of?	+ a common sugar (deoxyribose) + a phosphate group + a base
What are the different bases?	+ adenine (A) + thymine (T) + guanine (G) + cytosine (C)
How do the bases pair? (base pairing)	+ A always pairs w/ T + C always pairs w/ G
How 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.
how 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.
What is a triplet code?	The 3 bases on a DNA strand that code for one amino acid.
Where re amino acids joined together to make proteins?	@ the ribosomes in the cytoplasm.
What is messenger RNA (mRNA)	a single strand of DNA that carries information from the nucleus to the ribosome.
What are the differences between DNA and mRNA?	+ mRNA is only 1 strand + in mRNA thymine (T) is replaced by uracil (U)

Resource summary

	Created by lily bevan over 6 years ago