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Plant Growth And Development

339 Questions Start Allen Test
All Exams Allen Errorless
BHU 1994 Q126 Errorless Ethylene MCQ
Ethylene gas '
A.
Is a saturated hydrocarbon
B.
Slows down the ripening of apples
C.
Retards ripening of tomatoes
D.
Speeds up maturation of fruits and early ripening of some fruits
BHU 1994; Bihar MDAT 1995; RPMT 1999; BVP 2000; Pb. PMT 2004; HP PMT 2005; WB JEE 2009 Q127 Errorless Ethylene MCQ
Ethylene is a
A.
Gaseous hormone
B.
Gaseous enzyme
C.
Liquid-gas mixture
D.
Solid hormone
CPMT 1994, 2001, 03, 09; MP PMT 1994, 2005; BHU 1995, 2000; KCET 2000; Odisha JEE 2004; HP PMT 2005; AMU (Med.) 2006; Kerala PMT 2009 Q128 Errorless Ethylene MCQ
The ripening of fruits can be hastened by treatment with [NCERT Pg. No. 177]
A.
Gibberellic acid
B.
Indole acetic acid
C.
Florigen
D.
Ethylene gas
JIPMER 1994 Q129 Errorless Critical Thinking MCQ
Moving on a grass lawn facilitates better maintenance primarily owing to
A.
Removal of apical dominance and promotion of lateral meristem
B.
Removal of apical dominance
C.
Wounding which stimulate rapid regeneration
D.
None of the above
AlIMS 1994 Q130 Errorless Assertion and Reason MCQ
Assertion : Gibberellins induce flowering in long day plants. Reason: Genetically tall plantbecome dwarf by application of Gibberellin.
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
CPMT 1993 Q131 Errorless Auxin MCQ
Substances which originate at the tip of the stem and control growth elsewhere are
A.
Food material
B.
Auxins or hormones
C.
Vitamins
D.
Enzymes
CPMT 1993, 94, 96, 98, 2003; AFMC 2006 Q132 Errorless Gibberellins MCQ
Gibberellin was first extracted from
A.
Gibberella fujikuroi
B.
Algae
C.
Bacteria
D.
Roots of higher plants
CPMT 1993, 94, 2003; AIEEE Pharmacy 2003; DPMT 2004 Q133 Errorless Gibberellins Numerical
The gibberellins are plant growth hormones. They cause elongation of stems. Gibberellin was first isolated by Japanese workers from (c) A parasitic fungus (d) Scutellum of rice
MP PMT 1993; Odisha JEE 2012 Q134 Errorless Cytokinin MCQ
Richmond Lang effect can be observed in plants by the treatment of
A.
Cytokinin
B.
Ethylene
C.
Abscisic acid
D.
Gibberellins
CBSE PMT 1992 Q135 Errorless Ethylene MCQ
Artificial ripening of which of the following fruits is useless
A.
Mango
B.
Banana
C.
Grapes
D.
Pomegranate/Coconut
CBSE PMT 1991; Odisha JEE 2005; GUJCET 2007; J & K CET 2010 Q136 Errorless ABA and Other growth regulators MCQ
Abscisic acid treatment results in
A.
Leaf expansion
B.
Stem elongation
C.
Stomatal closure
D.
Root elongation
CBSE PMT 1990 Q137 Errorless Growth MCQ
Several horticultural techniques are followed for the production of 'bonsai' plants. One of them is drastic pruning of root system. Which of the following physiological factor is involved in that method
A.
Inadequacy of mineral nutrients
B.
Deficiency of auxins
C.
Impairment of water absorption
D.
Deficiency of cytokinins
CBSE PMT 1990 Q138 Errorless Plant Growth Regulators MCQ
Phytohormones control
A.
Growth
B.
Physiological functions
C.
Rooting
D.
Flowering
CBSE PMT 1990 Q139 Errorless Auxin MCQ
Which of the following movements is not related to change in auxin levels
A.
Nyctinastic leaf movement
B.
Movement of roots towards soil
C.
Movement of sunflower tracking the direction of the sun
D.
Movement of shoot towards light
CBSE PMT 1990; MP PMT 2000 Q140 Errorless Auxin MCQ
Highest concentration of auxins exist in [NCERT Pg. No. 175]
A.
At the base of various plant organs
B.
Growing tip of plants
C.
In leaves
D.
In xylem and phloem cells only
CBSE PMT 1990; BHU 2008 Q141 Errorless Auxin MCQ
Auxins are abundantly produced in
A.
Root
B.
Meristematic region of the root
C.
Shoot
D.
Meristematic region of the shoot
CBSE PMT 1990, 99; EAMCET 1995 Q142 Errorless ABA and Other growth regulators MCQ
Abscisic acid controls [NCERT Pg. No. 177]
A.
Shoot elongation
B.
Cell elongation and cell wall formation
C.
Cell division
D.
Leaf fall and dormancy
CBSE PMT 1990; AFMC 2006 Q143 Errorless Critical Thinking MCQ
Phytohormones are
A.
Hormones regulating growth from seed to adulthood
B.
Growth regulators synthesised by plants and influencing physiological processes
C.
Hormones regulating flowering
D.
Hormones regulating secondary growth
Q144 Allen INTRODUCTION TO DEVELOPMENT MCQ
Auxanometer is meant for measuring -
A.
Respiratory activity
B.
Photosynthetic activity
C.
Growth activity
D.
Osmotic pressure
Q145 Allen INTRODUCTION TO DEVELOPMENT MCQ
In plants growth is -
A.
Restricted to certain regions or structure
B.
Irreversible
C.
Change in size
D.
All the above
Q146 Allen INTRODUCTION TO DEVELOPMENT MCQ
Plant growth is primarily affected by two climatic factors which are :-
A.
Light and temperature
B.
Temperature and relative humidity
C.
Light and wind
D.
Rainfall and temperature
Q147 Allen INTRODUCTION TO DEVELOPMENT MCQ
In a growing plant, the first phase during the process of growth is -
A.
Cell division
B.
Cell enlargement
C.
Cell differentiation
D.
Cell maturation
Q148 Allen INTRODUCTION TO DEVELOPMENT MCQ
The maximum growth rate occurs in :-
A.
Exponential phase
B.
Stationary phase
C.
Senescent phase
D.
Lag phase
Q149 Allen PLANT GROWTH REGULATORS TO SEED DORMANCY MCQ
Primary precursor of I.A.A is :-
A.
Phenyl alanine
B.
Tyrosine
C.
Tryptophan
D.
Leucin BPD006
Q150 Allen PLANT GROWTH REGULATORS TO SEED DORMANCY MCQ
The biological activity of I.A.A is tested by :-
A.
α-amylase test
B.
Avena curvature test
C.
Endosperm activity test
D.
Chlorophyll preservation test