Turn on thread page Beta
    • Thread Starter
    Offline

    14
    ReputationRep:
    Can somebody help me understand how to understand the ms answer to this question:I feel like OCR mark schemes are quite confusing
    Name:  14.PNG
Views: 17
Size:  19.2 KB
    Attachment 731000731002
    Attached Images
     
    • Thread Starter
    Offline

    14
    ReputationRep:
    Bump
    Offline

    15
    ReputationRep:
    You just need to get your textbook and mark scheme and using the textbook, write an answer including the keywords in the mark scheme
    Offline

    13
    ReputationRep:
    Biology in general has terrible mark schemes
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    3
    ReputationRep:
    you should post the whole question

    but I wouldn't worry too much as it's a suggest question- any reasonable explanation would do


    my guess is that the DNA is there because it codes for specific proteins and/or enzymes that are specific to the functioning of the mitochondrion (dehydrogenase or cytochrome oxidase enzymes)

    As there are many mitochondrion in the cell it would seem appropriate that they have their own DNA and ribosomes to make their own proteins and/or enzymes rather than receiving proteins and/or enzymes from the cytoplasmic ribosomes (due to nucleus)


    also you could perhaps suggest an evolutionary perspective - ie mitochondrion were bacteria that crawled into cells (forming a mutualistic relationship) and their DNA remained


    https://www.quora.com/Why-do-mitocho...-their-own-DNA <------------- might help- all are very good answers to this suggest Q
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 13, 2018

University open days

  1. University of Cambridge
    Christ's College Undergraduate
    Wed, 26 Sep '18
  2. Norwich University of the Arts
    Undergraduate Open Days Undergraduate
    Fri, 28 Sep '18
  3. Edge Hill University
    Faculty of Health and Social Care Undergraduate
    Sat, 29 Sep '18
Poll
Which accompaniment is best?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.