List of top Biology Questions

Inhibitory effect of O2 on photosynthesis is
Synaptonemal Complex is formed
Eutrophication is caused due to
Vernalisation is
Bicarpellary ovary with obliquely placed septum is seen in :-
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect ?
The given figure shows transport of two molecules $A$ and $B$ through three different modes of facilitated diffusion. Select the correct option regarding it.
Respiratory Quotient (RQ) value of tripalmitin is -
In the dicot root the vascular cambium originates from :-
Following table summarises the comparisons between phyllodades and cladodes (cladophylls). Pick up the wrong differences and select the correct option,
What type of pollination takes place in Vallisneria?
Which of the following ecological pyramids is generally inverted ?
In pteridophytes, main plant body is a , which is into true roots, stem and leaves. Fill the blanks in above statement and select the correct option.
How does steroid hormone influence the cellular activities?
A selectable marker is used to:
The two antibiotic resistance genes on vector pBR322 are for
Crossing over takes place between which chromatids and in which stage of the cell cycle ?
Use of an artificial kidney during hemodialysis may result in : (a) Nitrogenous waste build-up in the body (b) Non-elimination of excess potassium ions (c) Reduced absorption of calcium ions from gastro-intestinal tract (d) Reduced RBC production Which of the following options is the most appropriate?
Consider the following statements i, ii and iii regarding criteria for essentiality of the nutrients in plants: i. The presence of elements is must for plants to complete their life cycle. ii. The role of the element can be replaced by another element. iii. The element must be directly involved in the metabolism of the plant. Choose the correct statement/s :
Match the following column I with column II.
Among the following, the narrow spectrum antibiotic is:
Cells in \(G_0\) phase:
What is the fate of the male gametes discharged in the synergid?
Pinus seed cannot germinate and establish without fungal association. This is because
Which of the following pair of organelles does not contain DNA?