List of top Botany Questions

In a genetic cross between a true-breeding tall parent bearing red flowers and a true-breeding dwarf parent bearing white flowers, only tall plants with red flowers are obtained in the F$_1$ population. Considering these two traits segregate independently, if one tall individual is selected from the F$_2$ population, the probability that it would be genotypically homozygous for plant height and make red flowers is ........... {(Round off to two decimal places)}
Which of the following reactions in plants is/are catalyzed by the malic enzymes?
Which of the following sequential reactions correctly represent(s) the flow of electrons from NADH to O2 in plant mitochondrial electron transport chain?

Correctly match the enzymes used as selectable markers (Group I) and the chemicals used for their selection (Group II):

Correctly match the economically important specialized metabolites (Group I) with their broad chemical classes (Group II):

Correctly match the names of the plant taxonomists (Group I) with the titles of the books they authored (Group II):

Identify the correct statement(s) with respect to plant disease:
Consider a diploid plant species where the cells in the epidermis (the outermost single cell layer) always divide in the anticlinal orientation. If one such cell within the central zone of the shoot apical meristem (SAM) spontaneously becomes tetraploid at the seedling stage, which one of the following cellular arrangements would be most likely observed if the meristem is examined at the adult stage?
Which one of the following mature cell types is live but usually lacks nucleus?
Which one of the following commercially important carbohydrates is naturally produced only by the members of the plant kingdom?
Which one of the following agents causes the necrotic ring spot disease in stone fruits?
The element which is important in determining solute concentration and oxygen evolution:

Choose the incorrect statement related to life cycles: 
I. Sporophyte generation is represented by a single-celled zygote. 
II. Gametophyte is multicellular in Pteridophytes and Gymnosperms. 
III. Life cycle is diphlaplontic in Bryophytes. 
IV. Life cycle is haplodiplontic in Pteridophytes.

The total number of meiotic divisions that occurred in a flower of malvaceae, which has 60 stamens with 25 microspore mother cells in each sporangium and 25 ovules in each carpel:
The number of cytosine molecules in a typical ds DNA molecule which is having 20 coils with 480 Hydrogen bonds.

Choose the incorrect statements regarding definition of Living:
(A) Cell division replaces lost cells in certain tissues
(B) In living organisms, growth is from outside
(C) Metabolism is the sum total of all chemical reactions occurring in the living organism
(D) In unicellular organisms, reproduction is not synonymous with the growth

Match the following: 

List-1:                                  List-2:

A Physical barrier                  I Lysozyme
B Physiological barriers        II Interferons
C Cellular barriers                  III Monocytes
D Cytokine barriers               IV Colostrum
                                                V Mucus membrane

Study the following and pick up the correct combinations: 

Variation in lengths of filaments of stamens within a flower is seen in:
The question asks for an example of RNA-containing viruses.

Identify the wrong pair:

Number of chromosomes in maize root cells at G1 phase, after S and M phases respectively
Assertion (A): Pancreas is a merocrine gland.
Reason (R): The apical parts of the pancreatic cells are pinched off along with the secretory product.

Match the following:


 

Assertion (A): By mutations genetic variations are created resulting in a new trait not found in the parental type.
Reason (R): Plants having desirable characters will be selected after inducing mutations with chemicals or radiation.