Practice Pakistan's most useful MCQs for competitive exams

When abdomen expands, the number of spiracles open is_____________?

• (A)  2
• (B)  3
• (C)  6
• (D)  8

Answer

Submitted By :Ali Uppal

Which of the following promotes growth in plants?

• (A)  Photorespiration
• (B)  Calvin cycle
• (C)  Both of these
• (D)  None of these

Answer

Submitted By :Ali Uppal

Number of spiracles present in the thorax of cockroach is___________?

• (A)  2
• (B)  3
• (C)  5
• (D)  4

Answer

Submitted By :Ali Uppal

Of the following, which one is a contagious disease?

• (A)  Tuberculosis
• (B)  Lungs cancer
• (C)  Asthma
• (D)  Emphysema

Answer

Submitted By :Ali Uppal

Number of spiracles present in cockroach is___________?

• (A)  15
• (B)  10
• (C)  20
• (D)  30

Answer

Submitted By :Ali Uppal

A disease of longs in which inside of the lungs is damaged resulting in cough and fever?

• (A)  Lung cancer
• (B)  Asthma
• (C)  Emphysema
• (D)  Pulmonary tuberculosis

Answer

Submitted By :Ali Uppal

More than ___________ compounds of tar of tobacco smoke are involved to cause cancer?

• (A)  5
• (B)  90
• (C)  15
• (D)  10

Answer

Submitted By :Ali Uppal

Active site of Rubisco is evolved to bind?

• (A)  CO2
• (B)  O2
• (C)  H2O
• (D)   All of these

Answer

Submitted By :Ali Uppal

Arterial blood contains _________ of CO2 per 100 ml of blood

• (A)  54 ml
• (B)  60 ml
• (C)  64 ml
• (D)  50 ml

Answer

Submitted By :Ali Uppal

Which of the following plays the major role in providing support to young herbaceous parts of the plant?

• (A)  Living cells of epidermis with higher turgor pressure.
• (B)  Living cells of cortex and pith with higher turgor pressure.
• (C)  Collenchyma cells
• (D)  All of these

Answer

Submitted By :Ali Uppal