General Science - Online Test
Q1. The DNA fragments in an agarose gel at the same position signify that the two fragments have
Answer : Option C
Explaination / Solution:
Gel electrophoresis is a technique used to separate DNA fragments (or other macromolecules, such as RNA and proteins) based on their size and charge. Electrophoresis involves running a current through a gel containing the molecules of interest. Based on their size and charge, the molecules will travel through the gel in different directions or at different speeds, allowing them to be separated from one another.
The DNA fragments in an agarose gel at the same position signify that the two fragments have same molecular weight and travel same distance.
Q2. People with chronic kidney disease are usually affected by anemia. It happens because damaged kidney doesn’t secrete sufficient :
Answer : Option A
Explaination / Solution:
The person suffering from chronic kidney disease are usually affected by anemia. The damage kidney is not able to secrete sufficient erythropoietin in blood that help in absorption of iron.
Q3. A 1.0-mol sample of an ideal gas is kept at 0.0C during an expansion from 3.0 L to 10.0 L. If the gas is returned to the original volume by means of an isobaric process, how much work is done by the gas?
Answer : Option A
Explaination / Solution:
Q4.
Which of the following statements are correct about origin of earth?
a. There was no atmosphere on early earth.
b. Water vapour, methane, carbon dioxide and ammonia are released from molten mass covered the earth.
c. Oxygen gas is released from plants during photosynthesis.
Answer : Option C
Explaination / Solution:
There was no atmosphere on early earth. Water vapour, methane, carbon dioxide and ammonia are released from molten mass covered the earth. Oxygen and hydrogen gas is formed by splitting of water by UV rays.
Q5.
Pay load is defined as the difference between the mass of displaced air and the mass of the balloon. Calculate the pay load when a balloon of radius 10 m, mass 100 kg is filled with helium at 1.66 bar at. (Density of air = 1.2 kg m-3 and R = 0.083 bar .
Answer : Option B
Explaination / Solution:
Volume of balloon,V=4/3(3.14) =4187 Mass of displaced air,m=V × δ =4187 x 1.2=5024.4 kg Temperature,T=300 K Moles of gas present,n=PV/RT=279.1 × 103 moles Mass of helium=279.1 ×103 x 4=116.4 kg Mass of filled balloon,m'=100+1116.4=1216.4 kg Payload=m-m'=3811.1 kg
Q6. Nucleotides are joined together by
Answer : Option D
Explaination / Solution:
Nucleotides are together by phosphodiester linkage.
Q7. The quickest, cheapest, and most effective way to reduce the buildup of carbon dioxide in the atmosphere is to
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. In Barley stem, vascular bundles are
Answer : Option B
Explaination / Solution:
The vascular bundles in Hordeum vulgare (barley) plant are scattered in ground tissues, many in number and vary in size-smaller towards periphery and bigger towards centre of the ground tissue, oval or rounded in outline, conjoint, collateral and closed.
Q9. Which is the incorrect statement from the following?
Answer : Option D
Explaination / Solution:
Lion (Pantheraleo), leopard (P. pardus) and tiger (P. tigris) with several common features, are all species of the genus Panthera. The genus Felisincludes cats. Hence, the correct option is Lion, tiger, leopard and cat belong to the same genus.
Q10. Kinetin was identified by
Answer : Option A
Explaination / Solution:
The discovery of Kinetin is comparatively more recent. Its credit goes to Miller et al (1955) who were working in Prof. Skoog’s laboratory at the University of Wisconsin on the growth of tobacco pith callus in culture and wanted it to grow indefinitely.
