AQA Biology Unit 2 18th January

there was only 3 people in the exam including me lol and we were in a small room so it was nice and relaxed (: i just need a D!!

5a - Why does 'insert antibiotic name' not effect humans?

Answer - Human cells do not have cell walls

5b - How does 'insert antibiotic name' effect Ribosomes (or something)

Answer - Stops Ribosomes from synthesising proteins

5c - How can the use of 'insert antibiotic name (the one that attacks cell walls) result in a strain of resistant bacteria?'

Answer - Random mutation of DNA bases causes resistant baceria
- 'Antibiotic' kills all non-resistant bacteria
- Resistant bacteria survive and reproduce, proportion of resistant bacteria increases
- Gene for resistance passed through vertical gene transmission in a conjugation tube

5d - Bacteria common in 'Species X' has recently been found in 'Species Y', use your knowledge of gene transmission to explain how this occured.

Answer - Species X passed the gene for resistance to Species Y
- Through horizontal gene transmission
- Through a conjugation tube
- In a plasmid

Sadly albinoism is caused by a mutated gene and not lack of melanin, wonder if they would count our fair skin comments afterwards... lol Such a random answer.

Vertical is due to binary fission isn't it?

Vertical gene transmission occurs when bacteria passes a piece of DNA to another bacteria of the same species. I dont think it was needed for that question to get marks but I wrote it anyway

I was saying that horozontal gene transmission uses conjugative tubes not vertical :/

Oh no.. I wasn't making fun... It was very funny.. I thought you wrote it on purpose. LoL ... my bad

I think they both do

there was only 3 people in the exam including me lol and we were in a small room so it was nice and relaxed (: i just need a D!!

Got a blooming toothache, not slept in the last 36 hours because of the pain, NHS made me wait 6 MONTHS for a consultation, then the headache came along, then I felt sleepy...basically...I envy you.

$Vertical gene transmission\not=Conjugation$

Conjugation is a part of horizontal gene transmission.

I have seen on previous exam questions 2 marks for

- Horizontal gene transmission
- Through conjugation tube

i had that, really bad the other day, but i rubbed toofpaste on it and it helped, (but mine was more like, real sensitive kind of thing... may help ( stings a tad for about 10 sec but then goes fine and makes you drool some but.... worked for me haha )

there was 2 of us resiting hours, i think the examiner wanted us to talk to him lol

That's what I'm saying.

not gonna lie, the person who said i rounded to 209 (TO THE NEAREST WHOLE PERSON), i want to marry you.

I wrote cytoplasm instead of stroma tsk tsk