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In a random mating population in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner?
Match the following organisms with the products they produce: Column I (a) Aspergillus niger (b) Acetobacter aceti (c) Clostridium butyricum (d) Lactobacillus Column II (i) Ethanol (ii) Citric acid (iii) Lactic acid (iv) Acetic acid (v) Butyric acid
Match List-I with List-II: List-I A. Saccharomyces cerevisiae B. Aspergillus niger C. Trichoderma polysporum D. Clostridium butylicum List-II I. Citric acid II. Butyric acid III. Ethanol IV. Cyclosporin-A
Which one of the following options gives one correct example of convergent evolution and divergent evolution respectively?
During sewage treatment, biogases are produced which include:
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
Milk of transgenic 'Cow Rosie' was nutritionally more balanced product for human babies than natural cow milk because it contained:
When gene targeting involving gene amplification is attempted in an individual's tissue to treat disease, it is known as:
Artificial selection to obtain cows yielding higher milk output represents:
Given below are two statements: Statement I: Antibiotics are chemicals produced by microbes that kill other microbes. Statement II: Antibodies are chemicals formed in body that eliminate microbes. In the light of the above statements, choose the most appropriate answer from the options given below.
An ionised H-molecule consists of an electron and two protons. The protons are separated by a small distance of the order of angstrom. In the ground state: (a) the electron would not move in circular orbits. (b) the energy would be 2⁴ times that of a H-atom. (c) the electron's orbit would go around the protons. (d) the molecule will soon decay in a proton and a H-atom. Choose the correct option:
In terms of Bohr radius a₀, the radius of the second Bohr orbit of a hydrogen atom is given by
Which of the following is wrongly matched in the given table? Microbe - Product - Application
The non-essential amino acid among the following is:
The variation of EMF with time for four types of generators is shown in the figures. Which amongst them can be called AC voltage?
An inductor of inductance L, a capacitor of capacitance C and a resistor of resistance R are connected in series to an AC source of potential difference V volts. The potential difference across L, C and R is 40 V, 10 V and 40 V, respectively. The amplitude of the current flowing through the LCR series circuit is $10\sqrt{2}$ A. The impedance of the circuit will be:
If $Z_1$ and $Z_2$ are the impedances of the given circuits (a) and (b) as shown in the figures, then choose the correct option:
Which one of the following is an example of carrying out biological control of pests/diseases using microbes?
The potential differences across the resistance, capacitance and inductance are 80 V, 40 V and 100 V respectively in an LCR circuit. What is the power factor of this circuit?
In a certain region of space with volume $0.2 \text{ m}^3$, the electric potential is found to be $5 \text{ V}$ throughout. The magnitude of the electric field in this region is: