Please refer to Chapter 19 Excretory Products and Their Elimination MCQ Class 11 Biology with answers below. These multiple-choice questions have been prepared based on the latest NCERT book for Class 11 Biology. Students should refer to MCQ Questions for Class 11 Biology with Answers to score more marks in Grade 11 Biology exams. Students should read the chapter Excretory Products and Their Elimination and then attempt the following objective questions.

MCQ Questions Class 11 Biology Chapter 19 Excretory Products and Their Elimination

The Excretory Products and Their Elimination MCQ Class 11 Biology provided below covers all important topics given in this chapter. These MCQs will help you to properly prepare for exams.

Question. Which points are not correct about angiotensin-II ?
(1) Decreases the glomerular blood pressure.
(2) Activates the adrenal cortex to release aldosterone
(3) Powerful vasoconstrictor
(4) Decreases the GFR
(5) Activates the JG cells to release renin.
(a) 1, 2, 3
(b) 1, 4, 5
(c) 3, 4, 5
(d) 2, 3, 5

Question. In which part of nephron water is not reabsorbed?
(a) PCT
(b) DCT
(c) Descending limb of Henle’s loop
(d) Ascending limb of Henle’s loop

Question. Which of the following group of animals are ammonotelic in nature ?
(a) Many bony fishes, amphibians, Insects.
(b) Marine Fishes, amphibians, aquatic insects
(c) Mammals, birds, Reptiles
(d) Many bony fishes, aquatic amphibians, aquatic insects.

Question. Which statement is not true regarding the reabsorption ?
(a) Nearly 99 percent of the filtrate has to be reabsorbed by the renal tubules.
(b) Nearly all of the essential nutrients are reabsorbed by PCT.
(c) DCT is also capable of reabsorption of HCO₃?
(d) Reabsorption of hydrogen and potassium ions occur in DCT.

Question. Find out the incorrect statement
(a) Ammonia is the most toxic form and requires large amount of water for its elimination.
(b) Kidneys do not play any significant role in ammonia removal.
(c) Human kidneys can produce only hypertonic urine nearly five times concentrated than the initial filtrate.
(d) Urea may be retained in the kidney matrix of some animals to maintain a desired osmolarity.

Question. Which substances are reabsorbed actively in nephron ?
(a) Glucose, water
(b) Glucose, Na⁺
(c) Amino acids, Urea
(d) Na⁺, Water

Question. Which statement is not correct about glomerular filtration?
(a) On an average 1100-1200 ml of blood is filtered by the kidney per minute.
(b) Glomerular filtrate is blood plasma except protein.
(c) GFR in a healthy individual is approxiamately 125 ml/minute or 180 lit per day. 
(d) Complete blood plasma is filtered in ultrafiltration process.