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Why would the simple diffusion of chloride ions across a cell membrane be extremely slow?

There are differnet ways that substances can move across a cell surface; simple diffusion, facilitated diffusion, osmosis or active transport. Most substances can move across the cell membrane via simple dif...
JB
Answered by Jess B. • Biology tutor
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Explain the effect succession has on biodiversity

Succession initiates in regions where there are very harsh conditions and so no organisms are able to survive (therefore little biodiveristy); -a pioneer species with good adaptaions are able to survive and ...
DM
Answered by Denya M. • Biology tutor
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Describe and explain the process by which proteins are created from DNA

Firstly, the relevant DNA has to be unwrapped, because it is stored in a very tightly wrapped-up form to save space in the cell. The Hydrogen bonds between the two strands are broken, and the coding strand i...
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Answered by Charlie S. • Biology tutor
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Draw a diagram of a human cell, include; the Nucleus, the Golgi Apparatus, Lysosomes, Ribosomes and Mitochondria, annotating your diagram with the general functions of each component and of the cell membrane.

Nucleus: Contains the DNA/ Human genome in the form of chromosomes (with the help of histone proteins), within a nuclear membrane which is inpenetrable by cytosolic enzymes. Golgi Apparatus: Transport/ modif...
VT
Answered by Victoria T. • Biology tutor
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How do muscles contract and how is this controlled?

Skeletal muscle is composed of myofibrils. The myofibrils contain repeating units called sarcomeres. This also called the operational units. The sarcomeres contain actin filaments and myosin filaments. The a...
EK
Answered by Erika K. • Biology tutor
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