Top answers

Biology
A Level

Describe how the resting state of a neurone in the body is maintained:

Na+/K+ ATP Transporters are found within the plasma membrane of a neurone. At rest, the transporters use ATP to pump 2 K+ ions into the cell for every 3 Na+ ions that are pumped out of the cell. This mean...

Answered by Konrad G. Biology tutor
2370 Views

Can you explain the different types of protein structure? (primary, secondary, tertiary and quaternary)

The primary structure of a protein is the sequence of amino acids found in the polypeptide chains, this sequence determines the shape and properties of the protein.The secondary structure of a protein is ...

Answered by Flora B. Biology tutor
2946 Views

(a) (i) Give a biological molecule that contains: 1. nitrogen 2. phosphorous (ii) Describe the role of microorganisms in producing nitrates from the remains of dead organims.

(i) 1. amino acid 2. DNA(ii) Decomposer microrganisms break down dead material into ammonia. Ammonia is then converted into nitrite and then oxidised to nitrate by nitrifying bacteria. The process is know...

Answered by Alice S. Biology tutor
7501 Views

Describe How Speciation Occurs Through Sympatric/Allopatric Speciation and What Are the Differences Between the Methods?

The main difference to consider would be that sympatric speciation occurs in the same habitat and population while allopatric speciation requires a geographical barrier between subsets of the population. ...

Answered by Rana E. Biology tutor
3093 Views

Describe the cardiac cycle, referring to the valves of the heart.

Deoxygenated blood enters the right atrium of the heart via the superior & inferior vena cavae. The atria contract and the right atrioventricular valve opens, allowing the blood to enter the right ven...

Answered by Thomas R. Biology tutor
2137 Views

We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences