Phytochrome is a

  •   flavoprotein

  •   glycoprotein

  •   lipoprotein

  •   chromoprotein

The Avena curvature is used for bioassay of
  • GA3
  • IAA
  • Ethylene
  • ABA

Typical growth curve in plants is

 
  • sigmoid
  • linear
  • stair-steps shaped
  • parabolic

Parthenocarpic tomato fruits can be produced by:

An enzyme that can stimulate germination of barley seeds is:

 

 

It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

 

What is the site of perception of photoperiod necessary for induction of flowering in plants?

The phytohormone which is supposed to be one of the factor responsible for regulating the opening and closing of stomata:

When a plant is flooded it often increases its production of

The plant hormone, _______________ , plays a role in closing of stomata.

Removal of shoot tips is a very useful technique to boost the production of tea- leaves. This is because

In order to increase the yield of sugarcane crop, which of the following plant growth regulators should be sprayed ?

Which of the following is  not an inhibitory substance governing seed dormancy?

Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.

Who coined the term 'Kinetin'?

Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:

Match the following concerning the activity/function and the phytohormone involved :-

(a) Fruit ripener         (i) Abscisic acid

(b) Herbicide             (ii) GA 3

(c) Bolting agent       (iii) 2, 4-D

(d) Stress hormone   (iv) Ethephon

Select the correct option from following :-

The plant hormone used to destroy weeds in a field is:

Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:

The site of perception of light in plants during photoperiodism is:
Promotion of flowering process in a plant by exposure to the prolonged cold of winter, or by an artificial equivalent, is called as:
 
Which PGR promotes flowering in pineapples, induces parthenocarpy in tomatoes and also used as herbicides?
 
PGRs can be broadly divided into two groups – plant growth promoters and plant growth inhibitors. Ethylene:
 
Different types of leaves in different phases of life in cotton, coriander and larkspur are an example of:
 
The increased growth per unit time is termed as growth rate. The exponential growth can be mathematically expressed as:
Match each item in Column I with the one given in Column II and select the correct match from the codes given:
COLUMN I COLUMN II
A Auxins P Terpenes
B Gibberellins Q Derivatives of carotenoids
C Cytokinins R Adenine derivative
D Abscisic acid S Indole compounds

Codes:
A B C D
1. S P R Q
2. P Q S R
3. Q R P S
4. R S Q P
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Practice Botany Quiz Questions and Answers