List of practice Questions

Identify the incorrect statement related to Pollination:

Identify the correct set of statements:

  1. The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea
  2. Axillary buds form slender and spirally coiled tendrils in cucumber and pumpkin
  3. Stem is flattened and fleshy on Opuntia and modified to perform the function of leaves
  4. Rhizophora shows vertically upward growing roots that help to get oxygen for respiration
  5. Subaerially growing stems in grasses and strawberry help in vegetative propagation

Choose the correct answer from the options given below:

The flowers are Zygomorphic in:

  1. Mustard
  2. Gulmohar
  3. Cassia
  4. Datura
  5. Chilli

Choose the correct answer from the options given below:

Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants?
Which one of the following never occurs during mitotic cell division?

In old trees the greater part of secondary xylem is dark brown and resistant to insect attack due to:

  1. Secretion of secondary metabolites and their deposition in the lumen of vessels.
  2. Deposition of organic compounds like tannins and resins in the central layers of the stem.
  3. Deposition of suberin and aromatic substances in the outer layer of the stem.
  4. Deposition of tannins, gum, resin and aromatic substances in the peripheral layers of the stem.
  5. Presence of parenchyma cells, functionally active xylem elements and essential oils.

Choose the correct answer from the options given below:

Which one of the following plants shows vexillary aestivation and diadelphous stamens?

Read the following statements and choose the set of correct statements:

  1. Euchromatin is loosely packed chromatin
  2. Heterochromatin is transcriptionally active
  3. Histone octamer is wrapped by negatively charged DNA in nucleosome
  4. Histones are rich in lysine and arginine
  5. A typical nucleosome contains 400 bp of DNA helix

Choose the correct answer from the options given below:

Given below are two statements:
Statement I: Decomposition is a process in which the detritus is degraded into simpler substances by microbes.
Statement II: Decomposition is faster if the detritus is rich in lignin and chitin.
In the light of the above statements, choose the correct answer from the options given below
Given below are two statements:
Statement I: Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance
Statement II: Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour, flower colour, pod shape and colour, flower position and stem height.
In the light of the above statements, choose the correct answer from the options given below:
What amount of energy is released from glucose during lactic acid fermentation?
Statement-I: An alloy of lithium and magnesium is used to make aircraft plates. 
Statement-II: The magnesium ions are important for cell-membrane integrity. 
In the light of the above statements, choose the correct answer from the options given below:
Which one of the following statements cannot be connected to Predation?
Which one of the following plants does not show plasticity?
The device which can remove particulate matter present in the exhaust from a thermal power plant is:
Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction are causes for:
Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis? It involves:
Which one of the following statements is not true regarding gel electrophoresis technique?
Match List - I with List - II. Choose the correct answer from the options given below:
 List - I List - II
(a)Manganese(i)Activates the enzyme catalase
(b)Magnesium(ii)Required for pollen germination
(c)Boron(iii)Activates enzymes of respiration
(d)Iron(iv)Functions in splitting of water during photosynthesis
Which of the following is not a method of ex situ conservation?
Which of the following is not observed during an apoplastic pathway?
Exoskeleton of arthropods is composed of:
The gaseous plant growth regulator is used in plants to:
The process of translation of mRNA to proteins begins as soon as:

Under isothermal conditions a gas expands from 0.2 dm3 to 0.8 dm3 against a constant pressure of 2 bar at 300 K. Find the work done by the gas.(1 dm3 bar = 100 J)