DP Biology (last assessment 2024)

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Question 22N.2.SL.TZ0.c

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Date November 2022 Marks available [Maximum mark: 2] Reference code 22N.2.SL.TZ0.c
Level SL Paper 2 Time zone TZ0
Command term Describe Question number c Adapted from N/A
c.
[Maximum mark: 2]
22N.2.SL.TZ0.c

The image shows a phospholipid bilayer that is a component of the cell membrane.

[Source: Boundless Learning. Course Hero. Phospholipids. [diagram online] Available at:
https://www.coursehero.com/study-guides/introchem/phospholipids/ [Accessed 1 November 2021].]

Describe two pieces of evidence that show that eukaryotic cells originated by endosymbiosis.

[2]

Markscheme
  1. mitochondria/chloroplasts have their own DNA;
  2. mitochondria can self-replicate/undergo a process like binary fission;
  3. mitochondria/chloroplasts have double membranes;
  4. mitochondria/chloroplasts have(70s) ribosomes;
  5. mitochondria/chloroplasts are sensitive to antibiotics;
  6. similar in size to bacteria

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