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Biology
All levels

List two reasons drugs to treat illness are often trialled

Accept any two from:

Toxicity

Dosage

Efficacy

side effects

CB
Answered by Charlotte B. Biology tutor
3683 Views

What affects enzyme activity?

Enzyme activity is dependent on five different factors. These include temperature, pH, concentration of substrate, concentration of inhibitor and concentration of the enzyme itself. Firstly, most enzymes ...

KF
Answered by Kristina F. Biology tutor
6442 Views

What is an enzyme?

An enzyme is a biological catalyst that enables reactions to occur by decreasing the activation energy they need. Not only would certain reactions not take place without the enzyme, they are also importan...

KF
Answered by Kristina F. Biology tutor
2633 Views

Cells becoming resistant to bacteria; Within a population of bacteria, NO cells are resistant to antibiotics. Over time, ALL cells are resistant to antibiotics. Outline the steps of natural selection that lead to a fully resistant population:

  • Within the bacterial population, the cells obtain different types of mutations. - One type of mutation is antibiotic resistance. - Some types of mutations are harmful to the cell, some have no or li...
ES
Answered by Emmaline S. Biology tutor
1885 Views

How many chromosomes dies each cell of the human body have ?

All human body cells have 23 pairs of chromosomes (46 total), 22 pair of autosomes and 1 pair of sex chromosomes.

However, sperm and egg cells only have one set of chromosomes (23 total).

HK
Answered by Helen K. Biology tutor
4863 Views

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