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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
2482 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
1776 Views

How should I structure my personal statement?

In terms of actual structure, the classic one is just fine, Introduction, Main Body and Conclusion. However, there's a set of questions you should be able to respond to in each section. I do believe havin...

CB
1728 Views

ما هو نوع المصدر وقفة في عبارة: "و لعل وقفة أمام المسجد الأقصى"؟

مصدر مرة

HK
Answered by Helen K. Arabic tutor
7554 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
4570 Views

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