Lesson 3 Flashcards
(5 cards)
1
Q
What is the function of the chloroplast?
A
Site of photosynthesis
2
Q
What is the stroma?
A
Colourless gel-like substance containing 70s ribosomes, circular DNA, lipids and starch grains
3
Q
What are thykaloids and grana?
A
Thykaloids are flattened sacs which stack together to form grana and these connected by lamellae
4
Q
Describe similarities between chloroplasts and mitochondria
A
• Have own DNA
• Have ability to generate metabolic energy
• Have 70s ribosomes
5
Q
Explain how mitochondria and chloroplasts may have evolved from archaic prokaryotes and microbes
A
Endosymbiosis theory suggests that they were once cells which were engulfed by larger cells, then forming endosymbiotic relationship with each other, forming mitochondria/chloroplasts.
