Name the plastid at work in each case. (a) The green cells inside a mango leaf…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Name the plastid at work in each case. (a) The green cells inside a mango leaf. (b) The yellow petals of a marigold. (c) The grains of rice, rich in starch. (d) The seeds of mustard, rich in oil. (e) A layer of cells in a wheat grain that stores protein.
Need a reminder? The key ideaShow
A mitochondrion has an outer membrane and an inner membrane folded into cristae, an outer compartment and a matrix. The matrix holds circular DNA and 70S ribosomes. Plastids: chloroplasts (chlorophyll), chromoplasts (carotene, xanthophylls), and leucoplasts: amyloplasts (starch), elaioplasts (oils and fats), aleuroplasts (proteins).
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Pigments. (a) Green comes from chlorophyll, so the leaf has chloroplasts. (b) Yellow comes from carotenoids, so the petals have chromoplasts.
Step 2. Stores. These are leucoplasts. (c) Starch is stored in amyloplasts. (d) Oil is stored in elaioplasts. (e) Protein is stored in aleuroplasts.
Answer: (a) chloroplasts, (b) chromoplasts, (c) amyloplasts, (d) elaioplasts, (e) aleuroplasts.
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