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Which one of the following products diffuses out of the chloroplast during photosynthesis?
A wire of length $L$ meters carrying a current of $I$ ampere is bent in the form of a circle. What is its magnetic moment?
The oscillation of a body on a smooth horizontal surface is represented by the equation, $X = A \cos(\omega t)$, where $X =$ displacement at time $t$, $\omega =$ frequency of oscillation. Which one of the following graphs correctly shows the variation of acceleration, $a$ with time, $t$? ($T =$ time period)
Read the following four statements A, B, C and D and select the right option having both correct statements: (A) Z-scheme of light reaction takes place in the presence of PSI only (B) Only PSI functional in cyclic photophosphorylation (C) Cyclic photophosphorylation results in a synthesis of ATP and NADPH2 (D) Stroma lamellae lack PSII as well as NADP
The minimum wavelength of X-rays produced by an electron accelerated through a potential difference of $V$ volts is proportional to
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
How many molecules of ATP and NADPH are required, respectively, for fixation of every CO2 molecule entering the Calvin cycle?
When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L + l). The elastic potential energy stored in the extended wire is :
In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as
If the concentration of a solution is changed from 0.2 to 0.4, then what will be the rate and rate constant? The reaction is of first order and rate constant is $k = 1 \times 10^{-6}$:
The simple Bohr model is not applicable to He-4 atom because: (a) He-4 is an inert gas. (b) He-4 has neutrons in the nucleus. (c) He-4 has one more electron. (d) electrons are not subject to central forces. Choose the correct option:
Which one of the following pairs is not correctly matched?
Fruit and leaf drop at early stages can be prevented by the application of:
The plant hormone used to destroy weeds in a field is:
Which hormone is used to induce immediate stomatal closure in leaves?
What is the site of perception of photoperiod necessary for induction of flowering in plants?
A straight conductor carrying current $I$ splits into two parts as shown in the figure. The radius of the circular loop is $R$. The total magnetic field at the centre $P$ of the loop is:
Which of the following PGR is present in coconut milk which is used in tissue culture?
"Foolish seedling" disease of rice led to the discovery of:
Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin