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How did Meselson and Stahl provide evidence for semi-conservative replication?

One sample of bacteria was grown in a nutrient broth containing light nitrogen (N 14 ) and one was grown in a broth with heavy nitrogen (N 15 ). The bacteria took up the nitrogen to make new nucleotides so i...
CS
Answered by Chloe S. • Biology tutor
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What is the role of tumour suppressor genes and oncogenes in the development of tumours?

Think of tumour suppressor genes and oncogenes like the pedals used to operate a car. Oncogenes are mutated forms of proto-oncogenes. Normally, these proto-oncogenes act like the gas pedal, and allow the cel...
TD
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What is the difference between mitosis and meiosis?

Both are processes of cell division in which one cell splits. In mitosis two genetically identical daughter cells are produced. In mitosis the 46 chromosomes within a cell (human) are duplicated, then one co...
MK
Answered by Milan K. • Biology tutor
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What are the difference types of transport across membranes?

Firstly we need to understand the structure of membranes. Cell membranes are made up of phospholipids. These are molecules with a hydrophilic head (it “likes water”) and hydrophobic tail (which “doesn’t like...
FS
Answered by Felix S. • Biology tutor
4620 Views

Describe how the process of translation occurs during protein synthesis.

After translation has occured in the nucleus with th DNA, the newly formed single-stranded mRNA molecule travels out of the nucleus via the nuclear pores and travels to the ribosome located in the cytoplasm ...
TK
Answered by Theo K. • Biology tutor
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