Question Discussion & Solution

The correct answer is Selenium.

Key Points

•  A trace element/minor element; is a chemical element whose concentration is very low.
• These include iron, manganese, copper, iodine, zinc, cobalt, fluoride and selenium.
• These minerals are present in living tissues of human body in small amounts.
• Some of them are known to be nutritionally essential, others may be essential and the remainder are considered to be nonessential.

• For most computer languages, the name of the file that holds the source code to a program is immaterial
• However, in Java the name given to a source file is very important
• The Java compiler requires that a source file uses the .java filename extension
• Only file.java follow the properties in the given options
• In Java, a source file is officially called a compilation unit; It is a text file that contains one or more class definitions

The correct answer is Twelve.

• Twelve members are nominated by the President in Rajya Sabha.

Key Points

• Rajya Sabha [Article 80]:
  • Rajya Sabha is a permanent body and not subject to dissolution. Its maximum strength is 250. The total membership of the present Rajya Sabha is 245 however one-third members retire every second
    year.
  • Their seats are filled up by fresh elections and a presidential nomination at the beginning of every third year.
  • There are no seats reserved for SCs and STs in Rajya Sabha.
  • Representation of People Act (1951) provided the term of office of a member of the Rajya Sabha shall be six years. 
  • In the Rajya Sabha, 12 members are nominated by the President from persons having special knowledge or practical experience of literature, science, art and social service.
  • The President is empowered to nominate not more than two Anglo Indian members to the Lok Sabha if that community is not adequately represented in that House.

The correct answer is Multiple fission.

• The ability of a cell to divide into several cells during reproduction in Plasmodium is called multiple fission.​

Key Points

• Cell- It is the structural and functional unit of life.
  • It is first discovered by Robert Hooke in 1665.
• According to Schwann and Schleiden, All new daughter cells are formed from pre-existing cells.
• Reproduction is a distinctive characteristic of Living Organisms.
  • Living organisms reproduce and give rise to similar organisms of the same species.
• Fission is the process in which a single cell divides into two or more than two cells.
  • When a single cell divides into two cells called Binary fission.
  • When a single cell divides into many cells called Multiple fission.

Important Points

• Plasmodium after feeding on RBCs undergoes asexual reproduction which is called schizogony or multiple fission. 
• In multiple fission, plasmodium divides into many cells.

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CONCEPT:

• Electric Power: The rate at which electrical energy is dissipated into other forms of energy is called electrical power i.e.,

\(P = \frac{W}{t} = VI = {I^2}R = \frac{{{V^2}}}{R}\)

Where V = Potential difference, R = Resistance and I = current.

EXPLANATION:

• Mathematically power can be written as,

\(\Rightarrow P = \frac{W}{t} = VI \)

If, W = 1 J and t = 1 sec, then P = 1 watt

• Thus the power of an electric circuit is said to be one watt or 1 ampere - volt if one joule of energy is consumed in one second. Therefore option 1 is correct.