Biology Exam: Answers and Discussion!

[apoorva1996]

What did you guys put for the two effects on behavior of bipedalism??

[skybluemaniac]

sex! and running to hunt

[Reus]

What did you guys put for the two effects on behavior of bipedalism??

Manipulation of tools and surroundings because of free hands
Able to save and conserve energy as bipedalism uses less energy than quadrupedalism thus used elsewhere (sex).

[vcestudent123]

Well there goes another mark. 

I know that feeling all too well..
I had the correct answer for one questions and literally last minute, I decided to change it and realised I was right all along, but it was too late since time was up

[selinasch]

I wrote that environmental factors would result in slightly different phenotypes as genetic material would be identical.

I got 16 and 32 too. For the genetic variation I just wrote crossing over or independent assortment and kinda elaborated on them both.

yeah i also did that, i discussed that crossing over and recombination could occur, and that the order of maternal and paternal chromosomes could be different and so that would result in genotypic variation, hopefully that's right 

[katiesaliba]

What did you guys put for the two effects on behavior of bipedalism??

I wrote that it'd free hands for tool usage, thus facilitating technological evolution. I also said that it'd allow for endurance hunting because that was mentioned on 'Walking with Cavemen' 

[vox nihili]

To be fair though, these exams do feel more "biologyish". They'll set you up better for later years.

[skybluemaniac]

Manipulation of tools and surroundings because of free hands
Able to save and conserve energy as bipedalism uses less energy than quadrupedalism thus used elsewhere (sex).

I thought that too. but it says behavioural not physiological so energy conservation wouldn't be an answer I think

[Reus]

I thought that too. but it says behavioural not physiological so energy conservation wouldn't be an answer I think

There goes another mark :')

[someone011]

Can someone please tell me if these are right or completely off topic:
- The question on the regulation of PTC (or something like that), was the concentration of PTC controlling the regulation of itself? Like, when there was more PTC (therefore the cell didn't need the production of more), the enzyme PTCase (which plays a role in producing PTC) had its quaternary structure changed, therefore less PTC was made.
- The question about the codons and monomers; was it 90x3 + 3x2? (Because of start and stop codons)?

[apoorva1996]

- The question about the codons and monomers; was it 90x3 + 3x2? (Because of start and stop codons)?

Omg I totally didn't realise you needed start and stop codons. I just did 90x3

[Reus]

Doesn't the start codon however code for an amino acid (Met)? So you wouldn't count it in?

[katiesaliba]

You know you're a nerd when you you already knew about Otzi and how he died prior to doing the bio exam today because you read about him in your spare time

Doesn't the start codon however code for an amino acid (Met)? So you wouldn't count it in?

You needed to account for stop codons. Thus=273. Yeah, met is an amino acid.

[Reus]

You know you're a nerd when you you already knew about Otzi and how he died prior to doing the bio exam today because you read about him in your spare time

You needed to account for stop codons. Thus=273. Yeah, met is an amino acid.

Lucky Otzi's question were pretty straight forward though!
And yep I put 270 nucleotides for the amino acid monomers and 3 for a stop codon. Wooo

[soNasty]

the poor elephants