Standard XII

Q.

Transgenic plants are the ones

1. Grown in artificial medium after hybridization in the field

2. Generated by introducing foreign DNA into a cell and regenerating a plant from the cell

3. Produced by a somatic embryo in artificial medium

4. Produced after protoplast fusion in artificial medium

Q.

Which of the following is an advantage of transgenesis?

1. Study of diseases and gene therapy

2. Increased production of biological products

3. Vaccine safety testing

4. All of the these

Q.

Insect resistance transgenic cotton has been produced by inserting a piece of DNA from

1. A bacterium

2. A wild relative of cotton

3. A virus

4. An insect

Q.

A transgenic food crop which may help in solving the problem of night blindness in developing countries is

1. Flavrsavr tomatoes

2. Bt soybean

3. Starlink maize

4. Golden rice

Q.

Which of the following is not applicable for a biopatent?

1. Unearthing the DNA sequences

2. Using the existing technology to produce new products

3. Formation of new products

4. Discovery of cell lines

Q. The vectors $\overrightarrow{a}=\lambda \hat{i}+\hat{j}+2\hat{k},\overrightarrow{b}=\hat{i}+\lambda \hat{j}-\hat{k}$ and $\overrightarrow{c}=2\hat{i}-\hat{j}+\lambda \hat{k},(\lambda \in Z)$ are coplanar, then the value of $\lambda$ is

1. $0$
2. $1$
3. $-2$
4. $-1$

Q. The position vectors of the points $A,B,C$ and $D$ are $3\hat{i}-2\hat{j}-\hat{k},2\hat{i}-3\hat{j}+2\hat{k},5\hat{i}-\hat{j}+2\hat{k}$ and $4\hat{i}-\hat{j}+\lambda \hat{k}$ respectively. If the points $A,B,C$ and $D$ lie on a plane, the find the value of $\lambda$ ?

Q.

Ecosystem is

1. Open

2. Close

3. Both open and close

4. Neither opened nor closed

Q.

Decomposers are

1. Protista and Monera

2. Bacteria and Fungi

3. Fungi and Plantae

4. Animalia and Monera

Q.

The functional aspect of a species with reference to the place of occurrence is called

1. Ecology

2. Species

3. Environment

4. Ecological niche