Biology Mcqs

Molecular formula of chlorophyll b is_____________?

• (A)  C55 H10 O4 N6 Mg
• (B)  C55 H70 O6 N5 Mg
• (C)  C55 H71 O6 N4 Mg
• (D)  C55 H70 O6 N4 Mg

Answer

Submitted By :Ali Uppal

At which times there is no net gaseous exchange between leaves and the atmosphere.

• (A)  Day time.
• (B)  Night time.
• (C)  Dawn & Dusk.
• (D)  Mid night.

Answer

Submitted By :Ali Uppal

Bacteriochlorophylls does not include________________?

• (A)  Chlorophyll e
• (B)  Chlorophyll d
• (C)  Chlorophyll a
• (D)  Chlorophyll c

Answer

Submitted By :Ali Uppal

C6H12O6 + 6O2 ? 6CO2 + 6H20 + ENERGY represents:____________?

• (A)  Photosynthesis
• (B)  Aerobic respiration
• (C)  Anaerobic respiration
• (D)  Respiration

Answer

Submitted By :Ali Uppal

Photosynthesis is process in which ________ compounds of carbon (CO2) and hydrogen (H2O) are reduced to carbohydrate like (glucose) using light energy.

• (A)  Organic
• (B)  Energy rich
• (C)  Energy poor
• (D)  Reduced

Answer

Submitted By :Ali Uppal

The first action spectrum was obtained by___________?

• (A)  T.W.Englemam
• (B)  Malleus
• (C)  T.W.Inws
• (D)  W.Stapes

Answer

Submitted By :Ali Uppal

Which of the following light is least absorbed by the plants?

• (A)  Orange
• (B)  Red
• (C)  Blue
• (D)  Green

Answer

Submitted By :Ali Uppal

The percentage of light absorbed by the leaf is ___________?

• (A)  20%
• (B)  15%
• (C)  10%
• (D)  1%

Answer

Submitted By :Ali Uppal

Visible light used in photosynthesis ranges from:__________?

• (A)  300 – 700 nm in wavelength
• (B)  350 – 750 nm in wavelength
• (C)  380 – 750 nm in wavelength
• (D)  390 – 790 nm in wavelength.

Answer

Submitted By :Ali Uppal

PS I has chlorophyll a molecule which absorbs maximum light of _________ nm ?

• (A)  600
• (B)  650
• (C)  680
• (D)  700

Answer

Submitted By :Ali Uppal