Biozone Questions

[Stick]

No, of course not!

[peterpan101]

No, of course not!

for someone who just picked up bio
you know alot !

[Stick]

I did some reading from Unit 1 AOS1. Otherwise, I've realised a bit of a passion for the subject.

[Smiley_]

Hi i have a couple of questions from biozone,

desribe the process that determines the sequence in which amino acids are linked together to form polypeptides

is this transcription, does it involve tRNA.



and relate the properties of a neutral fat or phospholipid to the type of fatty acid present.

thanks

[Scooby]

Hi i have a couple of questions from biozone,

desribe the process that determines the sequence in which amino acids are linked together to form polypeptides

is this transcription, does it involve tRNA.



and relate the properties of a neutral fat or phospholipid to the type of fatty acid present.

thanks

Transcription and translation. In translation, a specific amino acid is brought to the ribosomes by a tRNA molecule with a particular anticodon. This anticodon matches to a complementary mRNA codon and the amino acid is added to the growing polypeptide chain.


Triglycerides or phospholipids can contain fatty acids that are either saturated or unsaturated. A saturated fatty acid contains no double bonds between its constituent carbon atoms. Unsaturated fatty acids contain at least one of these double bonds.

Because of this, saturated fatty acids have a "linear" shape, while unsaturated fatty acids are "bent". As a result, a triglyceride or phospholipid that contains saturated fatty acids will form stronger intermolecular bonds with other triglycerides or phospholipids than a triglyceride or phospholipid containing unsaturated fatty acids will.

Because the intermolecular bonds between triglycerides containing saturated fatty acids are stronger, a higher amount of energy is required to change the substance that they make up from a solid to liquid. These substances tend to be solid at room temperature. Substances that are made up of triglycerides containing unsaturated fatty acids tend to be liquid at room temperature because the intermolecular bonds between these triglycerides is weaker. 

A substance made up of triglycerides that is solid at room temperature is generally called a fat. If that substance is liquid at room temperature, it's considered an oil.

Hopefully that makes a bit of sense 

[Smiley_]

Transcription and translation. In translation, a specific amino acid is brought to the ribosomes by a tRNA molecule with a particular anticodon. This anticodon matches to a complementary mRNA codon and the amino acid is added to the growing polypeptide chain.


Triglycerides or phospholipids can contain fatty acids that are either saturated or unsaturated. A saturated fatty acid contains no double bonds between its constituent carbon atoms. Unsaturated fatty acids contain at least one of these double bonds.

Because of this, saturated fatty acids have a "linear" shape, while unsaturated fatty acids are "bent". As a result, a triglyceride or phospholipid that contains saturated fatty acids will form stronger intermolecular bonds with other triglycerides or phospholipids than a triglyceride or phospholipid containing unsaturated fatty acids will.

Because the intermolecular bonds between triglycerides containing saturated fatty acids are stronger, a higher amount of energy is required to change the substance that they make up from a solid to liquid. These substances tend to be solid at room temperature. Substances that are made up of triglycerides containing unsaturated fatty acids tend to be liquid at room temperature because the intermolecular bonds between these triglycerides is weaker. 

A substance made up of triglycerides that is solid at room temperature is generally called a fat. If that substance is liquid at room temperature, it's considered an oil.

Hopefully that makes a bit of sense 

thanks sooo much it does,

sorry i more question.

use your knowledge of disaccharide chem to suggest how the digestive disorder lactose intolerance arises.

[Stick]

Basically, the small intestine does not secrete enough lactase in order to break down the lactose molecule into its two parts.

Hmm... this is an example of my poor wording. :|

EDIT: *has a second attempt*

The sufferer's digestive system is unable to secrete sufficient lactase enzymes to hydrolyse the lactose molecule into glucose and galactose molecules.

Is this better? lol

[Smiley_]

Basically, the small intestine does not secrete enough lactase in order to break down the lactose molecule into its two parts.

Hmm... this is an example of my poor wording. :|

EDIT: *has a second attempt*

The sufferer's digestive system is unable to secrete sufficient lactase to hydrolyse the lactose molecule into glucose and galactose molecules.

Is this better? lol

sounds great stick!

[Russ]

You might want to explain how the symptoms arise with reference to the enzyme

[Smiley_]

You might want to explain how the symptoms arise with reference to the enzyme

ok

[Stick]

You might want to explain how the symptoms arise with reference to the enzyme

Wouldn't know this yet. :|

[Scooby]

You won't have to know anything specific about lactose intolerance for the exam. I really doubt you'd have to know that lactose is a dimer of glucose and galactose either 

[KhymiSi]

Sorry to intrude but...can anyone please help me with this please. 

How does ATP generation in Glycolysis and the Krebs cycle differ from ATP generation via the electron transport chain?

Also, what is 'pyruvate' ?
Thanks!

[Scooby]

Sorry to intrude but...can anyone please help me with this please. 

How does ATP generation in Glycolysis and the Krebs cycle differ from ATP generation via the electron transport chain?

Also, what is 'pyruvate' ?
Thanks!

In glycolysis and the Krebs cycle, ATP is produced by substrate-level phosphorylation. In the electron transport chain, ATP is produced by oxidative phosphorylation. You really don't have to know anything about that though 

Pyruvate is an output of glycolysis and, for the purpose of VCE Bio, an input of the Krebs cycle. It's basically a three-carbon molecule formed following the breakdown of glucose

[KhymiSi]

In glycolysis and the Krebs cycle, ATP is produced by substrate-level phosphorylation. In the electron transport chain, ATP is produced by oxidative phosphorylation. You really don't have to know anything about that though 

Pyruvate is an output of glycolysis, and for the purpose of VCE Bio, an input of the Krebs cycle. It's basically a three-carbon molecule formed following the breakdown of glucose

Woah that was quick, thanks! Is that all we need to know? Wait, what part of glycolysis,etc. do I need to know in depth? Sorry and thanks in advance.