Function and Structure of DNA


A-Level Biology (2.1 Function and Structure of DNA) Flashcards on Function and Structure of DNA, created by Elena Cade on 28/04/2015.
Elena Cade
Flashcards by Elena Cade, updated more than 1 year ago
Elena Cade
Created by Elena Cade over 8 years ago

Resource summary

Question Answer
DNA is made up of 2... Strands
What is a Genome? All the different genes of an individual
Section of DNA that codes for a functional polypeptide: Gene
How many chromosomes do humans have in their body cells? 46
What do you call a different form of the same gene? An Allele
Name the sugar in DNA Deoxyribose
Name the monomers in DNA Nucelotides
What are the 3 components of a DNA monomer? Deoxyribose sugar, phosphate and an organic base
How many bonds are there between A & T 2
How many bonds are there between C & G 3
What are the 4 bases that make up DNA? Adenine Thymine Cytosine Guanine
Name the bonds which form between DNA nucleotides in the same strand Covalent
The overall shape of the DNA molecule? Double Helix
What joins the strands of nucleotides together? Hydrogen bonds
What ways can genetic information be passed on? Mitosis Meiosis
A complex chemical with an organic base, sugar and phosphate that makes up the basic unit of ac nucleic acid is ……..…? Nucleotide
What is the locus? The location of a gene on a chromosome
Non-coding sections of DNA Introns
How many bases are needed to make a code chain of 5 amino acids? 15
Present with eukaryotic DNA but absent with prokaryotic DNA Proteins (histones)
What is the shape of the DNA in bacteria? Circular
How is a long length of DNA compacted into a chromosome? It's coiled many times
The number of chromosomes in and egg and sperm is referred to as? Haploid / 23
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