Recent questions tagged ch10

Find the volume of the tetrahedron formed by the four planes $x+y=0,y+z=0,z+x=0,x+y=1$

asked Jul 9, 2019 by meena.clay6

1 answer

Describe the main ideas behind the biological control of pests and diseases.

asked Jul 9, 2017 by pady_1

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Why is aerobic degradation more important than anaerobic degradation for the treatment of large volu

asked Jul 9, 2017 by pady_1

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Which type of food would have lactic acid bacteria? Discuss their useful application.

asked Jul 9, 2017 by pady_1

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What are biofertilizers? Give two examples.

asked Jul 9, 2017 by pady_1

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Which bacteria has been used as a clot buster? What is its mode of action?

asked Jul 9, 2017 by pady_1

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What is a broad spectrum antibiotics? Name one such antibiotic.

asked Jul 9, 2017 by pady_1

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How do microbes reduce the environmental degradation caused by chemicals?

asked Jul 9, 2017 by pady_1

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How do bioactive molecules of fungal origin help in restoring good health of humans?

asked Jul 9, 2017 by pady_1

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Name the scientists who were credited for showing the role of penicillin as an antibiotic.

asked Jul 9, 2017 by pady_1

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How was penicillin discovered?

asked Jul 9, 2017 by pady_1

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Why are cyanobacteria considered useful in paddy plants?

asked Jul 9, 2017 by pady_1

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How do mycorrhizal fungi help the plants harbouring them?

asked Jul 9, 2017 by pady_1

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How has the bacterium bacillus turingiensis helped us in controlling caterpillars of insect pe

asked Jul 9, 2017 by pady_1

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Why are flocs important in biological treatment of waste water?

asked Jul 9, 2017 by pady_1

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What is the group of bacteria found in both the rumen of cattle and sludge of sewage treatment?

asked Jul 9, 2017 by pady_1

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Give an example of a rod shaped virus.

asked Jul 9, 2017 by pady_1

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Name an immune immunosuppressant agent.

asked Jul 9, 2017 by pady_1

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Name any two industrially important enzymes.

asked Jul 9, 2017 by pady_1

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Name the states involved in Ganga Action Plan.

asked Jul 9, 2017 by pady_1

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Which species of penicillium produces Roquefort cheese?

asked Jul 9, 2017 by pady_1

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Why are blue algae not popular as bio fertilizers?

asked Jul 9, 2017 by pady_1

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What is the source organism for EcoRI  restriction endonuclease?

asked Jul 9, 2017 by pady_1

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Give any two microbes that are useful in biotechnology.

asked Jul 9, 2017 by pady_1

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What would happen if our intestine harbours microbial flora exactly similar to that found in the rum

asked Jul 9, 2017 by pady_1

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Writ the most importamt characteristic that Aspergillus niger, Clostridium butylicum and Lactobacill

asked Jul 9, 2017 by pady_1

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Why is distillation required for producing certain alcoholic drinks?

asked Jul 9, 2017 by pady_1

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What for nucleopolyhydro viruses are used now a days?

asked Jul 9, 2017 by pady_1

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Why do we prefer to call secondary waste water treatment as biological treatment?

asked Jul 9, 2017 by pady_1

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Name the microbe used for production of strain. Hoe do strains lower blood cholesterol levels?

asked Jul 9, 2017 by pady_1

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What are fermentors?

asked Jul 9, 2017 by pady_1

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Why does "Swiss Cheese" have big holes?

asked Jul 9, 2017 by pady_1

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If the points $(1,1,p)$ and $(-3,0,1)$ are at equidistant from the plane $\overrightarrow {r} . (3 \hat {i} +4 \hat {j} -12 \hat {k}) + 13 = 0, $ then find the value of p.

asked Dec 28, 2016 by priyanka.c

1 answer

If $\theta$ is the angle between any two vectors $\overrightarrow {a} $ and $\overrightarrow {b}$ , then $|\overrightarrow {a} . \overrightarrow {b} | = |\overrightarrow {a} \times \overrightarrow {b}|$, then what is the value of $\theta$

asked Dec 20, 2016 by priyanka.c

1 answer

Find the area of the triangle formed where vertices are A (3, -1, 2), B (1, -1, -3) and C (4, -3, 1).

asked Dec 10, 2016 by priyanka.c

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If $\theta$ be the angle between two unit vectors. Evaluate $\sin \frac{\theta}{2}$

asked Nov 25, 2016 by priyanka.c

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If A, B, C are position vectors (2, 0, 0), (0, 1, 0) and (0, 0, 2) show that $\triangle ABC$ is isosceles .

asked Nov 23, 2016 by priyanka.c

1 answer

If $|\overrightarrow{a}| = 11, |\overrightarrow {b} | = 23 and |\overrightarrow {a} - \overrightarrow {b} |= 30 $

asked Nov 22, 2016 by priyanka.c

1 answer

Are the vectors $(\hat {i} + \hat{j} + \hat{k}), (2\hat{i} +3\hat{j} -\hat{k})$ and $(-\hat{i} -2\hat{j} +2 \hat{k})$ are linearly dependent ?

asked Nov 21, 2016 by priyanka.c

1 answer

Find the shortest distance between the line $l_ 1$ and $l_2$ given by: $\overrightarrow {r} = \hat{i} +2\hat{j} -4\hat{k} + \lambda (2 \hat{i} + 3 \hat {j} + 6 \hat {k}) and \overrightarrow {r }= 3\hat{i} + 3\hat{j} -5\hat{k} + \mu(2\hat{i} + 3\hat{j} + 6\hat{k}) $

asked Nov 20, 2016 by priyanka.c

1 answer

Find the vector and Cartesian equation of the line through the point (5, 2, -4) and which is parallel to the vector $3 \hat{i} +2 \hat{j} -8 \hat{k}$

asked Nov 19, 2016 by priyanka.c

1 answer

A line passes through (2, -1, 3) and is perpendicular to the line $\overrightarrow {r} = ( {\hat{i} + \hat {j} - \hat{k}}) + \lambda (2\hat{i} - 2\hat{j} +\hat{k}) $ and $\overrightarrow {r} = (2\hat{i} - \hat{j} -3\hat {k}) +\mu (\hat{i} + 2 \hat{j} +2\hat{k})$. Obtain its equation.

asked Nov 18, 2016 by priyanka.c

1 answer

If $\overrightarrow {a} = \hat{i} + 2\hat{j} + 3\hat{k}$ and $\overrightarrow {b} = 2\hat{i} + 4\hat{j} - 5\hat{k}$ represents two adjacent sides of a parallelogram, find unit vectors parallel to the diagonals of the parallelogram.

asked Nov 18, 2016 by priyanka.c

1 answer

Prove that the points A, B and C with position vectors $\overrightarrow{a}, \overrightarrow{b} and \overrightarrow{c}$ respectively are collinear if and only if $\overrightarrow{a} \times \overrightarrow{b} + \overrightarrow{b} \times \overrightarrow{c} + \overrightarrow{c} \times \overrightarrow{a} = 0$

asked Nov 13, 2016 by priyanka.c

2 answers