Quiz # 11

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#1 Who delivered the principle of ‘jumping gene’?

The explanation for this phenomenon involves “jumping genes” or transposons, and earned Dr. Barbara McClintock the prestigious Nobel Prize in Medicine in 1983 for her life-long research on corn genetics. Transposons are genes that move from one location to another on a chromosome.

#2 Blue-green algae is used to supply nitrogen to-

Bluegreen algae can be helpful in agriculture as they have the capability to fix atmospheric nitrogen to soil. This nitrogen is helpful to the crops. Bluegreen algae is used it as a biofertilizer.

#3 How many bones are there in human skeleton?

It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together. The bone mass in the skeleton reaches maximum density around age 21. The human skeleton can be divided into the axial skeleton and the appendicular skeleton.

#4 An antigen is a substance which-

An antigen is a substance that your immune system reacts against. A harmful virus is one kind of antigen. When your immune system detects some toxic foreign body or substance, it sends up defenses against this antigen called antibodies.

#5 Light energy changes into the chemical energy by which of the following process

During the process of photosynthesis, light penetrates the cell and passes into the chloroplast. The light energy is intercepted by chlorophyll molecules on the granal stacks. Some of the light energy is converted to chemical energy. During thisprocess, a phosphate is added to a molecule to cause the formation of ATP.

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ATTEMPT IN HINDI
July 19, 2019

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