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Monascus purpureus is the yeast used commercially in the production of:
Match Column-I with Column-II and select the correct option using the codes given below: Column-I A. Citric acid B. Cyclosporin A C. Statins D. Butyric acid Column-II 1. Trichoderma polysporum 2. Clostridium butylicum 3. Aspergillus niger 4. Monascus purpureus
Which one of the following is not a biofertilizer?
Which one of the following helps in absorption of phosphorus from the soil by plants?
A point object is placed at a distance of 60 cm from a convex lens of focal length 30 cm. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of 40 cm from it, the final image would be formed at a distance of:
An object is mounted on a wall. Its image of equal size is to be obtained on a parallel wall with the help of a convex lens placed between these walls. The lens is kept at distance x in front of the second wall. The required focal length of the lens will be:
In the combination of the following gates, the output Y can be written in terms of inputs A and B as:
Genetic engineering has been successfully used for producing:
Which part would be most suitable for raising virus-free plants for micro propagation?
A beam of light is incident vertically on a glass slab of thickness 1 cm, and refractive index 1.5. A fraction A is reflected from the front surface while another fraction B enters the slab and emerges after reflection from the back surface. The time delay between them is:
A horizontal ray of light is incident on a right-angled prism with a prism angle of $6^{\circ}$. If the refractive index of the material of the prism is 1.5, then the angle of emergence will be:
For the logic circuit shown, the truth table is:
A p-n photodiode is made of a material with a band gap of $2.0\text{ eV}$. The minimum frequency of the radiation that can be absorbed by the material is nearly:
C and Si both have the same lattice structure, having 4 bonding electrons in each. However, C is an insulator whereas Si is an intrinsic semiconductor. This is because:
A transistor is operated in common-emitter configuration at $V_c = 2\text{ V}$ such that a change in the base current from $100\, \mu\text{A}$ to $200\, \mu\text{A}$ produces a change in the collector current from $5\text{ mA}$ to $10\text{ mA}$. The current gain is:
The motion of planets in the solar system is an example of the conservation of:
The venturi-meter works on
An oil drop of 12 excess electrons is held stationary under a constant electric field of $2.55 \times 10^4$ N/C. The density of the oil is $1.26 \text{ g/cm}^3$. The radius of the drop is:
Pure $\text{Si}$ at $500\text{ K}$ has an equal number of electron ($n_e$) and hole ($n_h$) concentration of $1.5 \times 10^{16} \text{ m}^{-3}$. Doping by indium increases the hole concentration $n_h$ to $4.5 \times 10^{22} \text{ m}^{-3}$. The doped semiconductor is of:
The following graph represents the T-V curves of an ideal gas (where T is the temperature and V the volume) at three pressures $P_1, P_2$ and $P_3$ compared with those of Charles's law represented as dotted lines. Then the correct relation is: