List of top Botany Questions asked in Andhra Pradesh Engineering Agriculture and Medical Common Entrance Test

Number of chromosomes in maize root cells at G1 phase, after S and M phases respectively
Taxonomic keys are based on
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:

Diagram represents central dogma of molecular biology. Choose the correct labelling of "X" and "Y": 


 

Choose the correct combinations based on their Taxonomical features

Stem tubes, Corn, Rhizome, Cladophyll, Bulbil, Stolon modifications shown by this correct sequence of plants
Pyriform gametes with two laterally attached flagella are found in
The ratio of the number of electrons to be excited from PS II during non-cyclic photophosphorylation and PS I during cyclic phosphorylation respectively to form 120 ATPs
In Morgan's linkage experiments on Drosophila recombinants percentage for white eye and yellow body is:
The number of Guanines and Adenines present in the DNA molecule of pitch at 170° with 130 Hydrogen bonds between base pairs:
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 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:


 

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.
Identify the correct pair of variety crop developed for resistance to the disease:
Bacteria used to produce human insulin chains is:
Identify the wrong statement from the following:
The number of recombinants in the 1280 progeny obtained through a dihybrid cross of Mendel in the F2 generation.

Arrange the following in correct order in polymerase chain reaction cycle: 
I Deannealing
II Denaturation
III Extension
IV Annealing 
 

Assertion (A): Primers are used in polymerase chain reaction technique. Reason (R): Primers is used for the addition of new DNA nucleotides.

Identify A and B in the diagram given below: 


 

Choose the correct pair from the following: 


 

The genetic nature of TMV (Tobacco Mosaic Virus) as RNA was confirmed by: