when talking aout genes, what does it mean when it refers to the 'locus'?
any help appreciated, thanks!
You are Here:
Home
> Forums
>< Study Help
>< Maths, science and technology academic help
>< Biology, biochemistry and other life sciences
>< Biology Exams
|
AQA BIOL2 Biology Unit 2 Exam - 26th May 2011 watch
-
View Poll Results: Are you resitting this unit?Voters: 283. You may not vote on this poll
-
- Follow
- 361
- 23-05-2011 17:21
-
Introverted moron
- Follow
- 3 followers
- 2 badges
- Send a private message to Introverted moron
Offline2ReputationRep:- Follow
- 362
- 23-05-2011 17:24
(Original post by therapist_1)
Antibiotics will kill bacteria. Bacteria is sometimes the site of which viruses can be taken in and modified to form new strands of viruses or reproduce the orignal virus. (I can't explain the theory as it is 'suggest'). Therefore in killing these bacteria would avoid production of viruses hence treating the viral disease. This is little from HSW from NT text book and most from my mind and not entirely sure..
There are many types of haemoglobin (Hb), this depends on on the DNA that has coded for it. Each Hb organism contains Hb best suited to the environment they live in and can only have that one structure of Hb through out all the RBC.
Example: People in high altitude have Hb with higher affinity for oxygen than people living in lower altitude, due to lack of abundant oxygen.
-In the other hand that single type of Hb can change its shape slightly in response to CO2 levels. (will not go through the process).
Hope you understand now.
(Original post by ChessMister)
Are you sure the question is not, suggest why antibiotics cannot be used to treat viral diseases? -
Introverted moron
- Follow
- 3 followers
- 2 badges
- Send a private message to Introverted moron
Offline2ReputationRep:- Follow
- 363
- 23-05-2011 17:24
(Original post by ryan02)
when talking aout genes, what does it mean when it refers to the 'locus'?
any help appreciated, thanks! -
- Follow
- 364
- 23-05-2011 17:27
(Original post by STARMissyB)
Can somebody please help me and answer this?
"Explain how the venous return of the blood to the heart is maintained?" (5 marks)
Thanks
-valves
-muscle tissue
-which can contract
not sure about the other 2 marks :/ maybe elastic tissue, recoiling and stuff. or...gravity? :P -
LifeIsGood
- Follow
- 35 followers
- 12 badges
- Send a private message to LifeIsGood
Offline12ReputationRep:- Follow
- 365
- 23-05-2011 17:57
(Original post by ryan02)
when talking aout genes, what does it mean when it refers to the 'locus'?
any help appreciated, thanks! -
heavencanwait_
- Follow
- 3 followers
- 0 badges
- Send a private message to heavencanwait_
Offline0ReputationRep:- Follow
- 366
- 23-05-2011 18:06
(Original post by Introverted moron)
Thank you for your response, but I'm still a little confused. Also, what is RBC?
I thought there had been a mistake too, but that's definitely what the question says! -
thejungleman
- Follow
- 0 followers
- 0 badges
- Send a private message to thejungleman
Offline0ReputationRep:- Follow
- 367
- 23-05-2011 18:55
how do people feel about dna replication it seems confusing,
also does anyone know where the answers to the may 16th biology unit 1 paper are so i know roughly what i am on atm -
PumbaWiggles
- Follow
- 2 followers
- 0 badges
- Send a private message to PumbaWiggles
Offline0ReputationRep:- Follow
- 368
- 23-05-2011 19:08
(Original post by Insanity514)
What is a tissue?
We've been taught that it's and aggregation of similar cells grouped together to carry out one specific task.
But the mark scheme says that they are of "common origin"
So is the definition we've been taught still correct?
Also what does it mean by switching on genes?
Apparently when cells differentiate their genes are "switched on"??? -
- Follow
- 369
- 23-05-2011 19:09
(Original post by James A)
unlucky you, i got maths in the morning and biol2 in the afternoon, but your timetable is deadly, what subjects you doing ??
I know, it makes me wanna die. But I'm not really helping myself by sitting here doing nothing... -
- Follow
- 370
- 23-05-2011 19:10
(Original post by Master.K)
I got...Chem1 tomorrow, then day off, then general studies paper teehee), then on thurs afternoon biol2 and then friday I got economics unit 2 and chemistry unit 2! And it's my leavers day!
Aha, I'm so glad I don't do chemistry!! -
- Follow
- 371
- 23-05-2011 19:21
(Original post by STARMissyB)
Can somebody please help me and answer this?
"Explain how the venous return of the blood to the heart is maintained?" (5 marks)
Thanks
The mechanisms are:
Skeletal muscle pump: Working muscles push on near by veins, when the contract, forcing blood back to heart.
Respiratory Pump: a change in pressure causes the thoratic cavity to expand, pushing on nearby veins, (similar to the muscle pump).
Valves: prevent back flow.
Smooth muscles in veins: constrict, squeezing blood to heart.
All this happens in the veins.
Hope i could help -
- Follow
- 372
- 23-05-2011 20:30
I've written some notes if anyone wants to have a look
http://getrevising.co.uk/resources/aqa_biol2_notes
and if I've got anything wrong please feel free to let me know! -
therapist_1
- Follow
- 5 followers
- 0 badges
- Send a private message to therapist_1
Offline0ReputationRep:- Follow
- 373
- 23-05-2011 20:47
(Original post by Introverted moron)
Thank you for your response, but I'm still a little confused. Also, what is RBC?
I thought there had been a mistake too, but that's definitely what the question says!Probably just stick to what I have said about viruses, and RBC = Red Blood Cells.
Could you please tell me where have you found this question on antibiotics. -
therapist_1
- Follow
- 5 followers
- 0 badges
- Send a private message to therapist_1
Offline0ReputationRep:- Follow
- 374
- 23-05-2011 20:58
What is the best way in revising HSW, i just dont get it. Some of the answers in the mark scheme are obvious but I could have never thought of it in the exam.
-
heavencanwait_
- Follow
- 3 followers
- 0 badges
- Send a private message to heavencanwait_
Offline0ReputationRep:- Follow
- 375
- 23-05-2011 21:01
So what do people think will be on this?
-
LittleLaurenn
- Follow
- 0 followers
- 0 badges
- Send a private message to LittleLaurenn
Offline0ReputationRep:- Follow
- 376
- 23-05-2011 21:01
Can anyone explain to me the ' advantage of the S (sigmoid) shape curve for the oxgen-haemoglobin dissociation curve'
i have this question come up in few test papers. :/
Thanksssss -
ChessMister
- Follow
- 0 followers
- 12 badges
- Send a private message to ChessMister
Offline12ReputationRep:- Follow
- 377
- 23-05-2011 21:26
(Original post by heavencanwait_)
So what do people think will be on this? -
SmithytheDrummer
- Follow
- 0 followers
- 0 badges
- Send a private message to SmithytheDrummer
Offline0ReputationRep:- Follow
- 378
- 23-05-2011 21:35
(Original post by LittleLaurenn)
Can anyone explain to me the ' advantage of the S (sigmoid) shape curve for the oxgen-haemoglobin dissociation curve'
i have this question come up in few test papers. :/
Thanksssss -
- Follow
- 379
- 23-05-2011 21:36
(Original post by LittleLaurenn)
Can anyone explain to me the ' advantage of the S (sigmoid) shape curve for the oxgen-haemoglobin dissociation curve'
i have this question come up in few test papers. :/
Thanksssss
I dunno how close i got. -
Insanity514
- Follow
- 6 followers
- 12 badges
- Send a private message to Insanity514
Offline12ReputationRep:- Follow
- 380
- 23-05-2011 21:37
What does it mean by the first two bases of the triplet code are the most important as they code for the amino acid??? Anyone been taught that?
Also do we need to know anything about hypervariable regions in DNA? If so is it just not coding multiple repeats that can be used in DNA fingerprinting because the number of repeats in each person is different?
- AQA A-level Biology Unit 1 26th May 2016
- AQA A-Level Biology (7402) Exam Thread - June 12th, June ...
- AQA Biology AS Level Unit 2 thread
- AS/A Level Results Day March 8th Megathread
- Struggling with revision? Join the TSR session every hour!! ...
- The Revision Thread
- 2014 AS and A2 Results Day (Thursday 14th August) Official ...
- Official Cambridge Applicants Thread 2016 Entry
- The "Are my grades good enough for Maths..." Thread
- The "Are my grades good enough for Maths..." Thread
-
The Manchester College
-
Liverpool Hope University
-
Bath Spa University
-
Biology/Music (Professional Placement Year)
Bath Spa University
-
University of Huddersfield
-
University of St Andrews
-
Education/Biology (Secondary Teaching Pathway)
Bath Spa University
-
Central Lancashire (UCLan)
-
Keele University
-
University of Chester
We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.
- charco
- Mr M
- Changing Skies
- F1's Finest
- rayquaza17
- Notnek
- RDKGames
- davros
- Gingerbread101
- Kvothe the Arcane
- TeeEff
- The Empire Odyssey
- Protostar
- TheConfusedMedic
- nisha.sri
- claireestelle
- Doonesbury
- furryface12
- Amefish
- harryleavey
- Lemur14
- brainzistheword
- Rexar
- Sonechka
- TheAnxiousSloth
- EstelOfTheEyrie
- CoffeeAndPolitics
- an_atheist
- Labrador99
- EmilySarah00