List of top Botany Questions

In wild-type Arabidopsis thaliana, the four types of floral organs (sepal, petal, stamen, carpel) are arranged in concentric whorls from outside to inside. With reference to the ABC model of floral organ patterning, match the homeotic mutants in Group 1 with their respective arrangements of organs in the four whorls given in Group 2.
Group 1 Group 2
(P) A class mutants(i)sepal, sepal, carpel, carpel
(Q) B class mutants (ii) sepal, petal, petal, sepal 
(R) C class mutants(iii) carpel, stamen, stamen, carpel
 (iv) sepal, sepal, petal, petal
Which of the following plant diseases is/are caused by nematode?
Which one of the following plant families does apple (Malus domestica) belong to?
The collateral and open type of vascular bundle with endarch xylem strand is usually found in
Which of the following tissue types is/are established during embryogenesis in wild-type Arabidopsis thaliana?
If a 10 mM solution of a biomolecule in a cuvette with a path length of 10 mm absorbs 90% of the incident light at 280 nm, the molar extinction coefficient of the biomolecule at this wavelength is ____ M\(^{-1}\)cm\(^{-1}\). (Round off to two decimal places)
Mammalian cells cultured at low temperature (25 to 30 °C) leads to an increased sterol content in the membrane. Elevated sterols in the membrane results in
A person suffering from Iodine deficiency may be recommended to take extracts of this plant preparation.
Fusion between two similar gametes, two dissimilar gametes, and non-motile and motile gametes occurs in these organisms respectively.
A specific organism [A] showing the lack of cell wall, survive without oxygen, pleomorphic. The other organism [B] has cell wall embedded with silica and indestructible. A and B respectively belong to
List I List II List III
List IList IIList III
(a) Witches Broom(III) Mycoplasma(i) Prokaryote
(b) Sleeping Sickness(I) Trypanosome(iii) Protozoa
(c) Early Blight(IV) Alternaria(ii) Fungi
(d) Scrapie (II) Sheep(iv) Virus
Match the following
List IList IIList III
(A) One seeded bits of fruits(II) Mericarps(iv) Schizocarpic
(B) Jack fruit(I) Composite(iii) Entire inflorescence
(C) Fleshy thalamus (IV) Apple(i) Pome
(D) Fused pericarp & seed coat(III) Caryopsis(ii) Rice
Match the following
List AList B
A) Stigma II) Tip of the style
B) Seat of ovulesIII) Placenta
C) Basal part of GynoeciumIV) Ovary
D) Elongated tubeI) Style
Name the cells of mature pollen grain when you observe under microscope with the following characters respectively,
A) Bigger cell with abundant food reserve and large irregular shaped nucleus.
B) Small, dense cytoplasm with nucleus.
Assertion (A): There is no variation in size of mature seeds in orchids.
Reason (R): Lodoicea maldivica is the plant with largest seed.
Match the following
List IList II
I) Makoi D) Solanum nigrum
II) Red dragonA) Dracaena angustifolia
III) SarasaparillaB) Smilax zeylanica
IV) Night queenC) Cestrum nocturnum
The reason for the genetic variation in the population of organisms
The smooth and rough endoplasmic reticulum are involved in the synthesis of
Name the cell organelle which are involved in the following processes
A. Conversion of stored lipids to carbohydrates
B. Catabolism of long chain fatty acids
Assertion (A): Eukaryotic cells have the ability to adopt a variety of shapes and carry out directed movement.
Reason (R): Microfilaments, microtubules and intermediate filaments, constitute the cytoskeleton.
This type of cells are not present in phloem of a monocot stem.
In a dorsiventral leaf, the position of xylem
The physiological and morphological phenomena that happen when bulliform cells absorb water and undergo water stress respectively
Primary CO$_2$ acceptor in C$_4$ plants
Yeast poison themselves to death, because