Top answers

What is the structure of DNA?

DNA is a double helix. Consisting of two strands, which are made up of bases A T C and G Complementary base pairing occurs, where if part of one strand contains an A, the same part of the other strand contai...
TD
Answered by Thomas D. • Biology tutor
3995 Views

What is the role of ATP in muscle contraction?

ATP is responsible for cocking (pulling back) the myosin head, ready for another cycle. When it binds to the myosin head, it causes the cross bridge between actin and myosin to detach. ATP then provides the ...
TD
Answered by Thomas D. • Biology tutor
67529 Views

How is the lung adapted for gaseous exchange?

The lung consists of one cell thick bronchioles , which feed into round structures called alveoli , which are round in shape and also one cell thick. The bronchioles and alveoli are surrounded by capillaries...
TD
Answered by Thomas D. • Biology tutor
11471 Views

Is respiration the same thing as breathing?

No, they are not the same (although they do both involve the respiratory system!). The key differences:Breathing is the process of moving air in and out of the lungs - like when you take a breath.Respiration...
RL
Answered by Rhiannon L. • Biology tutor
30414 Views

What are the four levels of protein structure?

Primary - The sequence of amino acids in the Protein, defined by the DNA sequence coding for the protein. Secondary - Any folding or coiling within the protein which are stabilised by hydrogen bonds. The two...
TN
Answered by Theo N. • Biology tutor
6020 Views