Biology Marathon (1 Viewer)

[Hivaclibtibcharkwa]

This thread seems extremely useful, can we do one for chemistry?

Post a question relating to bio

 

[shadowlike04]

 

[Hamburger823]

Post a question

 

[shadowlike04]

I only do year 11 chem so idk about part b. Also wouldn't this be posted in a thread for chem?

 

[Hivaclibtibcharkwa]

View attachment 31524

No not chem questions in the bio marathon. I meant post a bio question

 

[[Blank]]

This thread seems extremely useful, can we do one for chemistry?

I don't do it, but I'm sure Hiva probably already has, (just a guess though).

 

[[Blank]]

View attachment 31523

a) Antibiotics are needed in assisting the body's anti-bodies in finding bacteria via antigens that bind to the foreign bacteria.
b) Viruses affect host cells by injecting their DNA for a spike in their reproduction and their survival. Since viruses make our own cells the target, something that isn't foreign, the antibodies wouldn't be able to respond to the infection by this specific method. Ultimately, anti-virals, a different medication, are responsible for assisting the body's immune system via an adaptive response.

 

[[Blank]]

View attachment 31524

I miss doing Chemistry!!
edit: ps. I mean that I dropped the subject when I wasn't thinking straight, not that I'm neglecting it.

 

[shadowlike04]

Sample Answers

a) A bacterium maintains its shape and protects itself from the external environment by having a cell wall. Some antibiotics inhibit the synthesis of a protein essential for the cell wall construction; this action weakens the cell wall and eventually results in cell lysis, killing the bacterial cell.

b) A virus is non-cellular and hence has no cellular structures or metabolic activities that an antibiotic can interfere with. For example, an antibiotic which prevents the production of an essential cell wall protein does not affect a virus as it has no cell wall.

 

[[Blank]]

Sample Answers

a) A bacterium maintains its shape and protects itself from the external environment by having a cell wall. Some antibiotics inhibit the synthesis of a protein essential for the cell wall construction; this action weakens the cell wall and eventually results in cell lysis, killing the bacterial cell.

b) A virus is non-cellular and hence has no cellular structures or metabolic activities that an antibiotic can interfere with. For example, an antibiotic which prevents the production of an essential cell wall protein does not affect a virus as it has no cell wall.

Yep, you definitely know your stuff - You actually reminded me about all that!

 

[[Blank]]

Vocab share: 'Eutherians' is another term used for Placential Mammals.

 

[hiiitsme]

 

[[Blank]]

View attachment 31538

I'm sorry, I have no idea. I'll just wait for a proper answer tomorrow from someone else.
(Before yours is answered though, I'm going to quickly add my own questions in for those that will binge answer tonight - aka, Hiva)

 

[[Blank]]

 

[[Blank]]

 

[[Blank]]

 

[[Blank]]

 

[[Blank]]

 

[shadowlike04]

View attachment 31538

B

 

[shadowlike04]

View attachment 31541View attachment 31542

Ultraviolet radiation is a type of non-ionising, electromagnetic radiation. Two types: UVA and UVB. UVA generates reactive free radicals that oxidises DNA bases which can lead to incorrect base pairing. UVB causes 2 pyrimidine bases on the same strands to link together and form a ‘dimer’. This causes a structural kink in DNA and also prevents replication