Biology 1st year chapter 13 Important questions from past papers

You will find Biology 1st year chapter 13 Important questions from past papers. These important questions include biology 11 mcqs, short and long questions are collected by going through different past papers of all Punjab Board Pakistan.

Why are these questions important?

These Questions are taken from past papers of Biology Class 11. These questions are top repeated of in previous papers of Biology 11 of all Punjab boards as;

Bahawalpur Board

D.G.Khan Board

Faisalabad Board

Gujranwala Board

Lahore Board

Multan Board

Rawalpindi Board

Content is created and designed with intense care and diligence. Here is only the most important MCQ, short questions and long questions of Biology class 11 chapter 13 Gaseous Exchange.

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You can easily download in pdf format or view Biology class 11 chapter mcqs, short questions and long questions online. You can easily print these files in simple way. Here you find Bilgy class 11 Chapter 13 Gaseous Exchange Variety of life important mcqs, short and long questions. By Preparing these important questions, you will achieve splendid marks in Biology class 11. This content is very helpful for weak students and also helpful for those students that are better at Biology 11 exam preparation. These Questions are based on the current Biology 11 syllabus according to Punjab Textbook Board.

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About This Chapter

Chapter 13 Gaseous Exchange of Biology 1st year introduces the students to exchange of respiratory gases. Students learn advantages and disadvantages of gas exchange in air and water. Students learn in details the respiratory organs in representative aquatic and terrestrial animals. Students learn about mechanism of voluntary and involuntary regulation of breathing. Students transport of gases. This Post "Biology 1st year chapter 13 Important questions from past papers" covers all important mcqs, short and long questions related to important topics of this chapter.

👉Imp MCQs - Biology Class 11 CH # 13

1. During photorespiration, glycine is converted in serine in the:

(A) Chloroplast

(B) Mitochondria

(D) Vacuole

(B) Mitochondria

2. Oxygen content of fresh air is about …….. ml per liter as compared with water:

(A) 200

(B) 100

(D) 150

(A) 200

3. The total lungs capacity for air is:

(A) 2 liters

(B) 5 liters

(D) 6 liters

(B) 5 liters

4. The lungs are covered by double layered thin membranous sacs called

(A) Pleura

(B) Air sacs

(D) Both A & B

(A) Pleura

5. Iron containing protein pigment occurring in muscle fibers is

(A) Myosin

(B) Actin

(D) Myoglobin

6. In earthworms exchange of gases mainly occurs through:

(A) Skin

(B) Gills

(D) None

(A) Skin

7. Tuberculosis is a disorder of:

(A) Excretory system

(B) Digestive system

(D) None of these

8. The respiratory organ in fishes are:

(A) Gills

(B) Lungs

(D) Air spaces

(A) Gills

9. Mostly the number of air sacs is:

(A) Nine

(B) Eight

(D) Two

(A) Nine

10. The floor of chest cavity is called:

(A) Diaphragm

(B) Pericardium

(D) None

(A) Diaphragm

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