GENERAL HISTOLOGY

INTRODUCTION

CELL ORGANELLES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What color can chloroplast not absorb?
A
Blue
B
Green
C
Orange
D
Red
Explanation: 

Detailed explanation-1: -Chlorophyll gives plants their green color because it does not absorb the green wavelengths of white light.

Detailed explanation-2: -Chlorophylls do not absorb wavelengths of green and yellow, which is indicated by a very low degree of light absorption from about 500 to 600 nm. The absorption spectrum of -carotene (a carotenoid pigment) includes violet and blue-green light, as is indicated by its peaks at around 450 and 475 nm.

Detailed explanation-3: -Chlorophyll, the green pigment common to all photosynthetic cells, absorbs all wavelengths of visible light except green, which it reflects.

Detailed explanation-4: -Chlorophyll b absorbs mostly blue and yellow light. They both also absorb light of other wavelengths with less intensity. However, none of them absorbs green, so the leaf looks green because that light is reflected to our eyes instead of being absorbed by the leaf.

Detailed explanation-5: -Green light is least absorbed by green leaves, which gives leaves their green appearance (McCree, 1971; Zhen et al., 2019).

There is 1 question to complete.