Heroin, commonly called as smack is a/an:

Arrange the following steps of retrovirus replication sequentially.
A. Production of viral DNA by reverse transcriptase
B. Introduction of viral RNA in host cell
C. Production of new viral RNA by host cell
D. Incorporation of viral DNA into host genome
Choose the correct answer from the options given below:

Identify the correct statements with respect to Homo habilis
A. Homo habilis had a brain size of 650-800cc
B. They probably did not eat meat
C. They lived near east and central Asia
D. These were the first human-like creature
Choose the correct answer from the options given below:

Chromosome number of in human meiocyte is :

Read the passage carefully. Attempt the questions.
In our body, cell growth and differentiation is highly controlled and regulated. In cancer cells, there is breakdown of these regulatory mechanisms. Cancerous cells just continue to divide giving rise to masses of cells called tumors. Benign tumors normally remain confined to their original location. The malignant tumors, on the other hand are a mass of proliferating cells. These cells actively divide and starve the normal cells by competing for vital nutrients. Cells sloughed from such tumors reach distant sites through blood, and wherever they get lodged in the body, they start a new tumor there. This property is called metastasis. Transformation of normal cells into cancerous cells may be induced by physical, chemical or biological agents called carcinogens.
Tobacco smoke been identified as a major cause of:

Which one of the following options will express intermediate skin colour in an individual?

Which of the following enzymes join the sticky ends in recombinant DNA technology?

Which of the following enzyme is used during isolation of DNA from fungal cells?

If the elementary column transformation \(C_1 \rightarrow 2 C_1\) is carried out on the following matrix equation.
\(\left[\begin{array}{ll}1 & 3 \\ 2 & 4\end{array}\right]\left[\begin{array}{cc}-1 & 2 \\ 5 & 0\end{array}\right]=\left[\begin{array}{ll}a & b \\ c & d\end{array}\right]\) Then the transformed equation will be:

Match List-I with List - II.

List - I	List - II
(A) Salmonella typhimurium	(I) Thermostable DNA polymerase
(B) Thermus aquaticus	(II) First recombinant DNA
(C) Bacteriophage	(III) Cry protein
(D) Bacillus thuringiensis	(IV) Cloning vector

Choose the correct answer from the options given below:

Two identical metal balls, A and B, with similar charges Q are suspended with insulating threads. They repel each other with a force F. Another identical uncharged metal ball C is first touched with metal ball A and then touched with metal ball B and finally removed. The new force of repulsion between A and B will be

Male grasshopper is an example of

In a cyclotron, if a deutron can gain a maximum energy of 40 MeV, then a proton can gain a maximum energy of _________