Entry test 2023 MDCAT contains most of the Biology MCQs. FSC Part 1 bio book MCQs. HSSC Biology questions MCQs. Solved Chapterwise Biology MCQs for first-year 11 class MCQs. Second-year and first-year bio textbooks chapter-wise MCQs with the answer are provided here. PakLearningSpot PLS MCQs Bank website for FREE Entry test preparations
When abdomen expands, the number of spiracles open is
Diaphragm is a sheet of:
NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:
Carbon dioxide is carried in the blood, mainly as:
NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:
The blood enters the _____ side of heart
Oxygen, released into the atmosphere, comes from:
NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:
The glycolate produced diffuses into the membrane bounded organelles called
Which of the following is the respiratory surface in human beings?
PMC Practice 3
Biology
Gaseous Exchange
Elimination Tool:
The oxygen-binding protein present in skeletal muscles is:
NUMS 2017
Biology
Gaseous Exchange
Elimination Tool:
The respiratory pigment, which has much higher affinity to combine with oxygen is:
NUMS 2016
Biology
Gaseous Exchange
Elimination Tool:
Which of the following is not an infection of the lungs/respiratory tract?
NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:
During inspiration, the space inside the chest cavity is increased due to:
UHS 2019
Biology
Gaseous Exchange
Elimination Tool:
The air spaces may comprise upto ______ of total volume of leaf surface.
Lungs are covered with double layered thin membranous sac called
The irritant substances of smoke cause smoker’s cough which weakened and bursts:
NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:
Nicotine in tobacco:
NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:
Oxygen is transported by combining with ……….. in Hb.
NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:
The function of respiratory passage, Cilia is to keep the airways clear of:
NTS 2019
Biology
Gaseous Exchange
Elimination Tool:
The maximum amount of oxygen which normal human blood absorbs and carries at sea level is how many ml per 100 ml of blood?
PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:
Thick, waxy & leathery cuticle around leaves is present in which of the following?
PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:
Gaseous exchange through the skin is known as ______ respiration.
Number of spiracles present in cockroach is
Chest cavity is bounded by ribs and muscles on the sides, while the floor of chest cavity is called:
NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:
A disease caused by gradual breakdown of the thin walls of alveoli is;
UHS 2019
Biology
Gaseous Exchange
Elimination Tool:
Hemoglobin can absorb maximum oxygen at sea level, which is _____ ml/100 ml of blood.
NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:
Xerophytes have small thick leaves to;
UHS 2019
Biology
Gaseous Exchange
Elimination Tool:
The most important cause of many of the respiratory disorders is:
NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:
Oxygen contents per liter of air is
Lungs are spongy due to the presence of million of
During inspiration, the diaphragm:
PMC Practice 3
Biology
Gaseous Exchange
Elimination Tool:
The gas-exchange portion of the human respiratory system is the:
NTS 2016 SMBBMC
Biology
Gaseous Exchange
Elimination Tool:
The number of stomata present per cm2 of leaf is:
PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:
Pharynx leads air into _____ through glottis.
NTS 2012
Biology
Gaseous Exchange
Elimination Tool:
Most oxygen is transported in the blood:
NUMS 2018
Biology
Gaseous Exchange
Elimination Tool:
Haemoglobin carries more oxygen than plasma by:
NTS 2011
Biology
Gaseous Exchange
Elimination Tool:
The infection of lungs is called:
PMC Practice 1
Biology
Gaseous Exchange
Elimination Tool:
Gaseous exchange in plants takes place through the:
NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:
Smaller the animals:
NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:
Which of the following correctly explains the structure of myoglobin:
NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:
The passageways of the respiratory system mucous secreting cells called:
NTS 2019
Biology
Gaseous Exchange
Elimination Tool:
During breathing air from Pharynx enters to:
UHS 2018
Biology
Gaseous Exchange
Elimination Tool:
As pH of blood decreases, H+ ions increases, which combine the proteins part of hemoglobin, to decrease its ability to bind with:
NUMS 2017
Biology
Gaseous Exchange
Elimination Tool:
Vocal cords, which help in voice production are two thin edged fibrous bands, present in:
NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:
Of the following, which one is better respiratory medium.
_________ respiration is directly involved in the production of energy, necessary for all living activities.
The structural and functional unit of the lungs is:
PMC Practice 2
Biology
Gaseous Exchange
Elimination Tool:
The voice box leads to the trachea which is also called
PMC Practice 1
Biology
Gaseous Exchange
Elimination Tool:
Water is _____ times viscous than air
In most birds air sacs are _____ in number
Vocal cords are stretched across
As pH of blood decreases, H+ ions increases, which combine the proteins part of hemoglobin, to decrease its ability to bind with:
NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:
Booklungs serve the function of respiration in:
NTS 2014
Biology
Gaseous Exchange
Elimination Tool:
Which one of the following is a genetic disorder in which abnormally thick mucus is produced in the lungs and other parts of the body?
NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:
Active site of Rubisco is evolved to bind
In which of the following are book lungs found?
NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:
Guard cells function as:
NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:
Breathing is considered as a:
PMC Practice 1
Biology
Gaseous Exchange
Elimination Tool:
Number of spiracles present in the thorax of cockroach is
Parabronchi are open at ______ end/s
Four plants are present in different environmental conditions. Plant A is present in a warm climate with continuous rainfall, plant B is present in a cool forest, plant C is present in a warm climate with little breeze, while plant D is present in a warm climate with high wind speed. Which one of the above plants will have the highest rate of transpiration?
UHS 2019
Biology
Gaseous Exchange
Elimination Tool:
There are ______ stomata per square cm of leaf surface in Tobacco plants.
Chest cavity is bounded by ribs and muscles on the sides, while the floor of chest cavity is called:
NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:
______ respiration is the process by which cell utilized oxygen and produces CO2
Lungs are separated from abdominal cavity by a muscular sheath called:
NUMS 2018
Biology
Gaseous Exchange
Elimination Tool:
Functional units of lungs are called
