List of practice Questions

A bacterial flagellum is composed of

The following type of cell junction is not found in animal tissues

Epigynous flower is one in which

Identify the correct statement/s regarding class aves.
1. Forelimbs are modified into wings and hindlimbs are modified for walking and swimming.
2. Heart is completely four-chambered.
3. They are homeotherms.
4. They are oviparous and development is direct.

Three phtodiodes D₁, D₂, D₃ are made of semiconductors having band gaps of 2.5 eV, 2 eV and 3 eV respectively. Which one will be able to detect light of wavelength 600 nm?

Identify the incorrect statement :

The plant body having holdfast, stipe and frond is a characteristic of

Identify the odd one out.

The concept of "Contagium vivum fluidum" was given by

In a nuclear reactor heavy nuclei is not used as moderators because

Which graph in the following diagram correctly represents the potential energy of a pair of nucleons as a function of their separation?

Identify the correct statement/s about ex situ conservation.
Advanced ex situ conservation includes
i. Cryopreservation of gametes.
ii. Plant tissue culture method.
iii. Seed bank.
iv. In vitro fertilisation.

An electron in an excited state of Li²⁺ ion has angular momentum \(\frac{3h}{2\pi}\). The de Broglie wavelength of electron in this state is Pπa₀ (where a₀ = Boh r radius). The value of P is

Match Column I and Column II

Column I		Column II
1.	Narrowly utilitarian argument	p.	Conserving biodiversity for major ecosystem services.
2.	Broadly utilitarian argument	q.	Every species has an intrinsic value and moral duty to pass our biological legacy in good order to future generation.
3.	Ethical argument	r.	Receiving benefits like food, medicine & industrial products.

The correct equation depicting species-area relationship is

Identify the incorrect statement.
1. Speciation is generally a function of time.
2. Trophical environment is less seasonal, relatively more constant and predictable.
3. Solar energy contributes to high productivity
4. Temperate regions have remained relatively undisturbed for millions of years.

Population size keeps changing depending on different factor/s such as

The figure shows standing de Broglie waves due to the revolution of electron in a certain orbit of hydrogen atom. Then the expression for the orbit radius is (all notations have their usual meanings)

Identify the incorrect statement.

Small mammals and birds are rarely found in polar regions. The reason is that

Relate Column I with Column II with regard to predatory behaviour.

Column I		Column II
1.	Calotropis	p.	Invertebrates
2.	Pisaster	q.	Distasteful
3.	Monarch butterfly	r.	Cryptically coloured
4.	Frogs	s.	Cardioglycoside

Identify the correct statement/s from the following :
1. Cuscuta is a chlorophyllous endoparasite.
2. The human liverfluke needs only one host to complete its life cycle.
3. The life cycle of endoparasite is more complex due to their extreme specialiasation.
4. During the course of evolution the host bird's eggs have evolved to resemble the eggs of the parasitic bird.

α - 1 antitrypsin is

Energy of an electron in the second orbit of hydrogen atom is E₂. The energy of electron in the third orbit of He⁺ will be

Silencing of a gene could be achieved through the use of