General Science - Online Test
Q1. Prothrombin plays crucial role in blood coagulation and vitamin K is considered essential for blood clotting, now read the following :
i. Vitamin K is necessary for synthesis of prothrombin in liver.
ii. Vitamin K is necessary for synthesis of prothrombin in bone marrow.
iii. Vitamin K is necessary for conversion of prothrombin into active thrombin.
i. Vitamin K is necessary for synthesis of prothrombin in liver.
ii. Vitamin K is necessary for synthesis of prothrombin in bone marrow.
iii. Vitamin K is necessary for conversion of prothrombin into active thrombin.
Answer : Option B
Explaination / Solution:
Prothrombin plays crucial role in blood coagulation and vitamin K is essential for blood clotting. Vitamin K is necessary for synthesis of prothrombin in liver.
Q2. During the formation of a chemical bond
Answer : Option C
Explaination / Solution:
A chemical bond is a lasting attraction between atoms that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between atoms with opposite charges, or through the sharing of electrons as in the covalent bonds.
When a bond forms, electrons are attracted to the space between nuclei where the electrostatic force of attraction is greater. As the electrons fall to a position of lower potential energy, the total mechanical energy of the molecular system decreases. Part of the mechanical energy of the unbound atoms is lost when they form the molecular system with a lower total mechanical energy.
Lower the energy higher the stability of bond.
Q3. A rectangular wire loop of sides 8 cm and 2 cm with a small cut is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the loop. What is the emf developed across the cut if the velocity of the loop is 1 cm in a direction normal to the longer side. For how long does the induced voltage last?
Answer : Option A
Explaination / Solution:
duration of |e| is
Q4. In kreb cycle, isocitric acid is converted into α-keto glutaric acid by
Answer : Option D
Explaination / Solution:
Citrate is first isomerised to isocitrate and then followed by decarboxylation, leading to the formation of α-ketoglutaric acid.
Q5. Which of the following is not a radioactive isotope
Answer : Option B
Explaination / Solution:
Lead 207 Metal (Lead-207) is a stable (non-radioactive) isotope of Lead. It is both naturally occurring and a produced by fission.
Lead 207 Metal is one of over 250 stable Metallic isotopes produced by American Elements for biological and biomedical labeling, as target materials and other applications.
Lead Metal 207 additionally has special application in isotope dilution to measure lead levels in blood
Q6. Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is
Answer : Option C
Explaination / Solution:
This is example of electrophilic aromatic substitution (EAS) reaction.Sincle Cl ion replaces hydrogen atom and here FeCl3 acts as halogen carriers.
Q7.
Light of wavelength 4000 is incident on a metal plate whose work function is 2 eV. The maximum kinetic energy of the emitted photoelectrons would be
Answer : Option B
Explaination / Solution:
ϕ0=2eVλ=4000A∘E=123754000=3.1eVKmax=E−ϕ0=3.1−2=1.1eV
Q8. The process of laying out a document with text, graphics, headlines and photographs is involved in
Answer : Option C
Explaination / Solution:
No Explaination.
Q9. Caustic soda is
Answer : Option A
Explaination / Solution:
Caustic Soda is NaOH.
Q10. Audio signals have a maximum bandwidth of about
Answer : Option D
Explaination / Solution:
No Explaination.
