List of top Questions asked in CBSE CLASS XII

Find the inverse of each of the matrices, if it exists. \(\begin{bmatrix} 3 & -1 \\ -4 & 2 \end{bmatrix}\)

Find the inverse of each of the matrices, if it exists.
\(\begin{bmatrix} 3 & 10\\ 2 & 7\end{bmatrix}\)

Prove \(tan^{-1}\sqrt{x}=\frac{1}{2}cos^{-1}(\frac{1-x}{1+x}),x∈[0,1]\)

Consult internet and find out how to make orally active protein pharmaceutical. What is the major problem to be encountered?

Which of the following differential equations has y=x as one of its particular solution?

Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil?

What are Cry proteins? Name an organism that produces it. How has man exploited this protein to his benefit?

What is gene therapy? Illustrate using the example of adenosine deaminase (ADA) deficiency.

Compare and contrast the advantages and disadvantages of production of genetically modified crops.

Area bounded by the curve y=x³, the x-axis and the ordinates x=2 and x=1 is

Suggest the aspects of reproductive health which need to be given special attention in the present scenario.

Find the area bounded by curves(x-1)²+y²=1 and x²+y²=1

Can you think and answer how a reporter enzyme can be used to monitor transformation of host cells by foreign DNA in addition to a selectable marker?

Can you recall meiosis and indicate at what stage a recombinant DNA is made?

Name the functions of the following.

1. Corpus luteum
2. Endometrium
3. Acrosome
4. Sperm tail
5. Fimbriae

Differentiate between:

1. Hypocotyl and epicotyl;
2. Coleoptile and coleorrhiza;
3. Integument and testa;
4. Perisperm and pericarp

Area of the region bounded by the curve y²=4x, y-axis and the line y=3 is

Fill in the blanks:

1. Human Reproduction _____________ .(asexually/sexually)
2. Humans are _________. (oviparous/viviparous/ovoviviparous)
3. Fertilization is __________in humans. (external/internal)
4. Male and female gametes are __________. (diploid/haploid)
5. Zygote is ___________. (diploid/haploid)
6. The process of release of the ovum from a mature follicle is called _____________.
7. Ovulation is induced by a hormone called the __________.
8. The fusion of the male and the female gametes is called ____________.
9. Fertilization takes place in the __________.
10. The zygote divides to form __________, which is implanted in uterus.
11. The structure which provides vascular connection between the fetus and uterus is called __________.

What is triple fusion? Where and how it take place? Name the nuclei involved in triple fusion.

What is bagging technique? How is it useful in a plant breeding programme?

Area lying in the first quadrant and bounded by the circle x²+y²=4 and the lines x=0 and x=2 is

What are chasmogamous flower? Can cross-pollination occur in cleistogamous flowers? Give reason for your answer.

What is meant by monosporic development of female gametophyte?

Find the area of the region bounded by the curve y²=4x and the line x=3

Arrange the following terms in the correct developmental sequence: Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes