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Physics Unit-4 from momentum, impulse and collision 1. Momentum can be described as A. Mass per motion B. Mass in motion C. Mass in rest D. All 2. In isolated system A. An individual momentum always conserved B. Momentum is conserved in all type of…

Biology Unit-4 Genetics

1. What is the basic unit of heredity in living organisms?

A. Protein
B. Lipid
C. Gene
D. Carbohydrate

2, A molecule of heredity is

A. Chromosome
B. DNA
C. Genes
D. Histone

3, Which of the following structures contains the genetic material of a cell?

A. Mitochondria
B. Ribosome
C. Nucleus
D. Endoplasmic Reticulum

4, What is a chromosome made up of?

A. Proteins and Lipids
B. DNA and Proteins
C. Carbohydrates and DNA
D. RNA and Lipids

5, Which nitrogenous base is not found in DNA?

A. Adenine
B. Thymine
C. Uracil
D. Cytosine

6, In what form is DNA found in prokaryotic cells?

A. Linear chromosomes
B. Circular chromosomes
C. Helical chromosomes
D. Fragmented chromosomes

7, The shape of the DNA molecule is best described as:

A. A single helix
B. A double helix
C. A triple helix
D. A quadruple helix

8, What is the main function of mRNA in cells?

A. To synthesize proteins
B. To replicate DNA
C. To transfer amino acids
D. To act as a template for protein synthesis

9, Which enzyme is responsible for unwinding the DNA double helix during replication?

A. DNA ligase
B. DNA polymerase
C. RNA polymerase
D. Helicase

10, What is the difference between a gene and a chromosome?

A. A gene is made of RNA, a chromosome is made of DNA.
B. A gene is a segment of DNA, a chromosome is a long DNA molecule with associated proteins.
C. A gene is a protein, a chromosome is a lipid.
D. There is no difference; they are the same.

11, How many chromosomes are in a typical human somatic cell?

A. 23
B. 46
C. 22
D 44

12, How many pairs can form one turn of double helix DNA?

A.20
B.10
C.15
D.30

13, How are the two strands of DNA held together?

A. Ionic bonds
B. Covalent bonds
C. Hydrogen bonds
D. Metallic bonds

?Short Answer

14, What is a karyotype?

15, The name of scientist(s) who are credited with the discovery of the DNA double helix structure?

?Comment your answer and
suggestions below

Physics Unit-4 from momentum, impulse and collision

1. Momentum can be described as

A. Mass per motion
B. Mass in motion
C. Mass in rest
D. All

1. In isolated system

A. An individual momentum always conserved
B. Momentum is conserved in all type of collisions
C. There is no external force
D. There is no net internal force

1. Collisional force is

A. Dissipative force
B. Action and reaction force
C. Acted by one object
D. None of the above

1. When two objects are collide
   and if there individual impulse is equal

A. The change in momentum of individual mass is the same in magnitude
B. They stick together and go to in the same direction
C. The net internal force is zero
D. Kinetic energy is conserved

1. The change in momentum is caused by

A. Collision
B. Impulse
C. Net force
D. Velocity

1. Impulse is

A. The quality of motion
B. The change kinetic energy
C. The change in momentum caused by net force
D. Mass in motion

1. In isolated system two objects with equal mass collide elastically then

A. There kinetic energy is not conserved
B. Momentum of individual mass
Is not conserved
C. They will stick together
D. Bounce off

1. Two electrons initially move with the speed v in opposite direction and collide perfectly inelastically then

A. They will bounce off
B. They will stick together with final speed v=0
C. Kinetic energy will be conserved
D. Their individual momentum can’t be conserved

1. When two masses collide perfectly inelastically, there common final velocity comes to zero. If u1=2u2 what you can say about there mass?

A. M1=2M2
B. M1=1/2(M2)
C. 1/2(M1)=M2
D. Additional info required

1. Two protons had a relative velocity of approach 24 m/s collide elastically then what will be there relative velocity of separation?

A. 24 m/s
B. -24 m/s
C. 0 m/s
D. -1 m/s

1. Two equal masses move in opposite direction and m1 have much greater initial velocity than m2 after collide elastically what will be the ratio of there relative velocity of approach and separation?

A. Very high value
B. Very low value
C. 1
D. Additional info required

1. If a mass explode in to two equal pieces what will be their motion direction?

A. The same direction
B. Opposite direction
C. Rest
D. Can’t determine

1. If a heavy body and light body have equal KE then what you can say about there momentum

A. The lighter body have great momentum
B. The heavier body have great momentum
C. Both have equal momentum
D. The lighter body have small momentum

?Give Short answer
14. How can a small force have the same impulse relative to large force?

15.Is it necessary to say the total energy of a system is conserved whenever the momentum of the system is conserved?

?Comment your answer and
suggestions below

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Answers and explanations for the multiple-choice questions on Capacitors and Capacitance:

1. B) Farad
   Explanation: The SI unit of capacitance is the Farad, symbol F.

2. D) Charge on the plates
   Explanation: The capacitance of a capacitor is directly proportional to the area of the plates and the permittivity of the dielectric material, and inversely proportional to the distance between the plates.

3. A) Increases
   Explanation: When a dielectric material is inserted between the plates of a capacitor, the capacitance increases due to the material's ability to store more charge.

4. A) Area of the plates
   Explanation: In a parallel plate capacitor, the capacitance is directly proportional to the area of the plates.

5. C) Quadruples
   Explanation: The energy stored in a capacitor is directly proportional to the square of the potential difference across it.

6. A) 1/2CV^2
   Explanation: The energy stored in a capacitor is given by the formula 1/2CV^2, where C is the capacitance and V is the potential difference across the capacitor.

7. A) Decreases
   Explanation: The capacitance of a capacitor Decreases when the distance between the plates is increased.

8. B) Square of the voltage across the capacitor
   Explanation: The total energy stored in a capacitor is directly proportional to the square of the voltage across the capacitor.

9. C) Glass
   Explanation: Glass is a common dielectric material used in capacitors due to its insulating properties.

10. A) Storing charge
    Explanation: Capacitors are used in electrical circuits to store and release electrical energy in the form of charge.

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10 Multiple Choice Questions From Phyisics Grade 11 Unit 6 Capacitor and Capacitance Topic 1. What is the SI unit of capacitance? A) Ohm B) Farad C) Coulomb D) Volt 2. Which of the following factors does not affect the capacitance of a capacitor? A) Area…

1. What does Coulomb's Law describe?

? The relationship between electric fields and charges
♥️ The relationship between electric potential and charge
? The relationship between magnetic fields and charges
? The relationship between electric fields and currents

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