Students of class 11 Biology should refer to MCQ Questions Class 11 Biology Plant Growth and Development with answers provided here which is an important chapter in Class 11 Biology NCERT textbook. These MCQ for Class 11 Biology with Answers have been prepared based on the latest CBSE and NCERT syllabus and examination guidelines for Class 11 Biology. The following MCQs can help you to practice and get better marks in the upcoming class 11 Biology examination

Chapter 15 Plant Growth and Development MCQ with Answers Class 11 Biology

MCQ Questions Class 11 Biology Plant Growth and Development provided below have been prepared by expert teachers of grade 11. These objective questions with solutions are expected to come in the upcoming Standard 11 examinations. Learn the below provided MCQ questions to get better marks in examinations.

Question. Quantitative comparisions between the growth of living systems can be made by :
(a) Absolute growth rate
(b) Relative growth rate
(c) Exponential growth rate
(d) Both (a) and (b)

Question. Which of the following is/are related to the type of growth in which both the progeny cells, arise from mother cell, retain the ability to divide?
(A) Sigmoid curve
(B) expressed as W₁ = W₀ + rt
(C) Linear curve
(D) Three phases – Lag, exponential and stationary
(a) A and D
(b) A, B and D
(c) Only C
(d) B and C

Question. Swelling of piece of wood when placed in water is not considered as growth because :
(a) It does not occur at expense of energy
(b) It is not a metabolic change
(c) It is reversible process
(d) It is extrinsic process

Question. Trees showing seasonal activities, represent what kind of growth curve ?
(a) Sigmoid
(b) Linear
(c) J-shaped
(d) double sigmoid

Question. Select out the incorrect match :
(a) GA – speed up malting process
(b) Auxin – Xylem differentiation
(c) Cytokinin – Adventitious shoot formation
(d) Ethylene – Lateral shoot growth

Question. Plant growth is unique because :
(a) It is intrinsic
(b) It occurs at the expense of energy
(c) Plant retains the capacity for unlimited growth throughout their life
(d) Its accompanied by metabolic processes

Question. Match the following :

(A) Cytokinin	(i) Weed free lawns
(B) Auxin	(ii) Brewing industry
(C) Abscissic acid	(iii) Root hair formation
(D) Ethylene	(iv) Overcome apical dominance
(E) Gibberellin	(v) Stress hormone

(a) A – iv, B – i, C – v, D – ii, E – iii
(b) A – i, B – ii, C – v, D – iii, E – iv
(c) A – iii, B – iv, C – v, D – i, E – ii
(d) A – iv, B – i, C – v, D – iii, E – ii

Question. Which of the following show higher rate of respiration?
(a) Collenchyma
(b) Leaf
(c) Dry seeds
(d) Germinating seeds

Question. Which one of the following is the product of the dark reaction of photosynthesis?
(a) CO₂
(b) ATP
(c) Pyruvic acid
(d) Phosphoglyceric Acid

Question. Which one of the following elements is not an essential micronutrient for plant growth?
(a) Zn 
(b) Cu
(c) Ca 
(d) Mn

Question. ABA is involved in-
(a) Dormancy of seeds
(b) Root elongation
(c) Shoot elongation
(d) Increases cell division

Question. In mitochondrial electron transport system-
(a) Number of ATP molecules synthesised does not depend on nature of electron donor
(b) Ubiquinone receives reducing equivalents via FADH2 also
(c) Cytochrome c is a large protein attached to inner surface of inner mitochondrial membrane
(d) Complex IV has cyt. a and cyt. a3 but no copper centres

Question. In the C4 plant-
(a) All the chloroplasts are of same type
(b) Kranz anatomy occurs where mesophyll have large chloroplasts whereas bundle sheath have smaller chloroplasts
(c) Kranz anatomy occurs where mesophyll have small chloroplasts whereas bundle sheath have larger agranal chloroplasts
(d) Kranz anatomy where mesophyll cells produces Glucose.

Question. Auxin increases the ___ of cell walls result in cell enlargement.
(a) Plasticity 
(b) Thickness
(c) Porosity 
(d) Rigidity

Question. Stroma lamellae membrane lacks
(a) PS I only
(b) PS II only
(c) PS I and electron carriers
(d) PS II and NADP reductase

Question. Reduction of NAD does not occur in which of the following?
(a) Isocitric acid →ketoglutaric acid
(b) Malic acid →Oxaloacetic acid
(c) Pyruvic acid →Acetyl coenzyme A
(d) Succinic acid →Fumaric acid

Question. In anaerobic glycolysis, 2 molecules of inorganic phosphate are used per molecules of glucose consumed. Which of the following enzyme catalyzes the uptake of inorganic phosphate?
(a) Hexokinase
(b) Phosphofructokinase
(c) Glyceraldehyde3-phosphate dehydrogenase
(d) Pyruvate kinase

Question. Which of the following is correct regarding glycolysis?
(a) It occurs in the cytoplasm of the cell.
(b) Hydrogen atoms are removed from NAD⁺ and transferred to PGAL.
(c) ATP is consumed during the conversion of PEP into pyruvic acid.
(d) Conversion of 3PGA to 2PGA is an ATP yielding reaction.

Question. Select the wrong statement from the following
(a) Both chloroplasts and mitochondria have an internal compartment, bounded by the thylakoid membrane.
(b) Both chloroplasts and mitochondria contain DNA.
(c) The chloroplasts are generally much larger than mitochondria
(d) Both chloroplasts and mitochondria contain an inner and an outer membrane.

Question. Which of the following statements is correct about competitive inhibitors?
(a) The inhibitor does not resembles the substrate.
(b) The inhibitor competes with the substrate for the allosteric sites.
(c) Inhibition of succinic dehydrogenase by malonate which closely resembles the substrate succinate in structure is an example of it.
(d) This mechanism is used in the controlling of glycolysis.

Question. There are two plants A and B with respective critical photoperiod of 13 hours and 11 hours.
When they are exposed to light for a period of 12 hours, it initiated flowering in both. Which of the following conclusion is most appropriate for these plants?
(a) Both plants A and B are long day plants
(b) Both plants A and B are short day plants
(c) Plant A is short day plant, and Plant B is long day plant
(d) Plant A is long day plant, and Plant B is short day plant

Question. Some respiratory enzymes are given below.
Arrange them in increasing order of the carbon number in the substrate on which they act :-
1. Enolase
2. Aconitase
3. Fumerase
4. Alcohol dehydrogenase
Options :
(a) II, IV, III, I 
(b) IV, I, II, III
(c) I, IV, III, II 
(d) IV, I, III, II

Question. Given below is a reaction catalyzed by enzyme Z.

Choose the correct option with respect to the category of enzyme Z.
(a) Oxidoreductases 
(b) Transferases
(c) Lyases 
(d) Hydrolases

Question. Which of the following is correct with respect to uphill transport using pump proteins?
(a) Lower concentration to higher concentration utilize ATP
(b) Higher concentration to lower concentration utilize ATP
(c) Higher concentration to lower concentration without utilize ATP
(d) Lower concentration to higher concentration without utilize ATP

Question. Which of the following is not correct regarding translocation of food in plants?
(a) In food transport the source-sink relationship is variable depending on the season or the plant’s need.
(b) Phloem sap consists of mainly water and sucrose, but other sugars, hormones and amino acids are also translocated through the phloem.
(c) In sugar utilizing sink cells, the osmotic pressure must be very high so that they can get water along with sugar from the phloem.
(d) Active transport is required for the process of loading and unloading of sugar.