Biology Unit 3 Questions Megathread

[HERculina]

you know a polar R group can it for a hydrogen bond with a different polar R group then the polar one it usually bonds to?

[shinny]

Yeh. Hence why those chaperone proteins referred to in your post a few questions ago are needed.

[dooodyo]

Hey guys,

I was doing the TSSM 2010 exam when I came across this question.
Why would the answer be glycoprotein? Wouldn't molecule A be a
glycolipid sinceit isn' attached to a protein? If not how did they
decipher the answer to be glycoprotein?

[Kaille]

Hey guys,

I was doing th TSSM 2010 exam when I came cross this question.
Why would the answer b glycoprotein? Wouldn't molecule A be a
glycolipid?

It looks like glycolipid to me. it is obviously on the phospholipid bilayer rather than on the protein.

[HERculina]

a reason for it being more of a glycoprotein could be because glycolipids usually have more of it is suspended in the plasma membrane since the bottom bit it lipid soluble. whereas this picture indicates that the whole conjugated molecule  is hydrophilic.

[jane1234]

I would have said that it was a glycolipid also, as there is no obvious protein structure attached to it.
Maybe it is because glycolipids are generally shorter than glycoproteins (although that is relative anyway)?

[Russ]

Someone do me a favour and tell me what are the things you've studied so far. Would I be correct in assuming that you've just finished Area of Study 1?
ie this

• the chemical nature of the cell
– synthesis of biomacromolecules: polysaccharides, nucleic acids and proteins
– the structure and function of lipids
– the structure and function of DNA and RNA
– the structure and functional diversity of proteins: the proteome;
• the role of organelles and plasma membranes in the packaging and transport of biomolecules;
• the nature of biochemical processes
– enzymes as organic catalysts
– energy requirements of cells; catabolic and anabolic reactions
– energy transformations, including main stages in and sites of photosynthesis and cellular
respiration; ATP-ADP cycle; factors affecting rate of energy transformations;
• applications of molecular biology in medicine including the design of drugs and in medical
diagnosis.

[jane1234]

Someone do me a favour and tell me what are the things you've studied so far. Would I be correct in assuming that you've just finished Area of Study 1?
ie this

• the chemical nature of the cell
– synthesis of biomacromolecules: polysaccharides, nucleic acids and proteins
– the structure and function of lipids
– the structure and function of DNA and RNA
– the structure and functional diversity of proteins: the proteome;
• the role of organelles and plasma membranes in the packaging and transport of biomolecules;
• the nature of biochemical processes
– enzymes as organic catalysts
– energy requirements of cells; catabolic and anabolic reactions
– energy transformations, including main stages in and sites of photosynthesis and cellular
respiration; ATP-ADP cycle; factors affecting rate of energy transformations;
• applications of molecular biology in medicine including the design of drugs and in medical
diagnosis.

Yeah finished all that... just started homeostasis, responses and feedback and I think we are meant to finish about half of AOS2 over the holidays...

[Russ]

Cheers. I'll post a thread with questions / post sample questions in here next week.

[WhoTookMyUsername]

thanks Russ,
My teacher is a bit behind, so we've only covered up to photosynthesis in class :S

[jane1234]

Cheers. I'll post a thread with questions / post sample questions in here next week.

That would be great!! Thanks

[Russ]

There will be no photosynthesis questions posted because I hate it and don't consider it important.

But yeah, probably no earlier than Tuesday because I'm still finishing exams

[HERculina]

this question is abit confusing :
Muscle cells respire using
a)aerobic respiration
b)anaerobic respiration
c)both aerobic and anaerobic respiration
d)fermentation

[shinny]

this question is abit confusing :
Muscle cells respire using
a)aerobic respiration
b)anaerobic respiration
c)both aerobic and anaerobic respiration
d)fermentation

...C?

[scocliffe09]

this question is abit confusing :
Muscle cells respire using
a)aerobic respiration
b)anaerobic respiration
c)both aerobic and anaerobic respiration
d)fermentation

I would say c) both. Muscles are certainly capable of respiring aerobically (normal functioning) but when put under pressure (e.g. 100m sprint) can also undergo anaerobic respiration.