Biology Mcqs

In alcoholic fermentation Pyruvic acid is broken down into?

• (A)  Acetaldehyde
• (B)  Methyl alcohol
• (C)  Ethyl alcohol
• (D)  Lactic acid

Answer

Submitted By :Ali Uppal

Deficiency of ___________ causes yellowing in plants?

• (A)  Magnesium
• (B)  Iron
• (C)  Chlorine
• (D)  Oxygen

Answer

Submitted By :Ali Uppal

Chlorophylls mainly absorb _________ wavelengths?

• (A)  Orange – blue
• (B)  Violet – red
• (C)  Yellow – orange
• (D)  Orange – red.

Answer

Submitted By :Ali Uppal

Complete breakdown of glucose molecule takes place in which of the following?

• (A)  Alcoholic fermentation
• (B)  Lactic acid fermentation
• (C)  Aerobic respiration
• (D)  All of these

Answer

Submitted By :Ali Uppal

Of the following, which one is better respiratory medium___________?

• (A)  Air
• (B)  Water
• (C)  Soil
• (D)  None of these

Answer

Submitted By :Ali Uppal

During rest the breathing occurs rhythmically at the frequency of _________ times per minute in human?

• (A)  16-30
• (B)  15-20
• (C)  5?10
• (D)  6?12

Answer

Submitted By :Ali Uppal

___________ respiration is the process by which cell utilized oxygen and produces CO2 ?

• (A)  Cellular
• (B)  Organismic
• (C)  Both of these
• (D)  None of these

Answer

Submitted By :Ali Uppal

Lungs are covered with double layered thin membranous sac called___________?

• (A)  Disphragm
• (B)  Pleura
• (C)  Pericardium
• (D)  Rib cage

Answer

Submitted By :Ali Uppal

___________ respiration is directly involved in the production of energy, necessary for all living activities?

• (A)  Organismic
• (B)  Cellular
• (C)  Both of these
• (D)  None of these

Answer

Submitted By :Ali Uppal

Lungs are spongy due to the presence of million of___________?

• (A)  Air sacs
• (B)  Alveoli
• (C)  Bronchioles
• (D)  Parabronchi

Answer

Submitted By :Ali Uppal