Top answers

What are the two types of nucleotide bases which make up DNA, and which bases bond with one another? What is the difference with these bases in RNA?

The two types of nucleic bases are purines and pyrimidines. The purines are adenine and guanine, and the pyrimidines are cytosine and thymine. Purines always bond with pyrimidines and in DNA, adenine and thy...
NJ
Answered by Nour J. • Biology tutor
5281 Views

What is the basic biochemistry of carbohydrates?

Three types of carbohydrates: 1. Monosaccharide. "Mono" means one. Contains one sugar monomer. 2. Disaccharide. "Di" means two. Contains two sugar monomers. 3. Polysaccharide. "Poly&...
BG
Answered by Beth G. • Biology tutor
3237 Views

What is the difference between type 1 and type 2 diabetes?

Both types mean that the person's body cannot make enough insulin to decrease blood glucose concentrations after a meal. Type 1 is caused by the body's immune system attacking the cells in the pancreas which...
NS
Answered by Natasha S. • Biology tutor
3400 Views

Explain how neurons communicate across a synapse.

A neuronal action potential depolarises the pre-synaptic membrane (neuron 1) causing voltage-gated calcium channels to open.2) Extracellular calcium ions bind to receptors on the pre-synaptic membrane causin...
Answered by • Biology tutor
2921 Views

Describe how mRNA is produced in the nucleus of a cell

mRNA is a molecule produced in the process of transcription, the first stage of protein synthesis from a DNA molecule. First, DNA Helicase, an enzyme, is used to break the hydrogen bonds holding the double s...
Answered by • Biology tutor
3293 Views