Basic Science Test 23

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Basic Science Test 23

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Weekly Quiz Competition

Question 1
1 / -0

Where is the DNA located in a eukaryotic cell?

A
Nucleus

B
Chromosomes

C
Mitochondria

D
All of the above
Question 2
1 / -0

Choose the true statement about steel shot versus lead shot.

A
Steel shot weighs about one-third less than lead shot.

B
Steel shot produces a larger pattern than lead shot.

C
Steel shot is softer and denser than lead shot.

D
Steel shot is more unstable in flight than lead shot.
Question 3
1 / -0

Polygalactronoids are the major constituents of

A
Middle lamella

B
Primary cell wall

C
Secondary cell wall

D
Cell membrane
Question 4
1 / -0

Rotate : Energy :: Stop : ?

A
Spin

B
Break

C
Inertia

D
None
Question 5
1 / -0

Which two microscopes generate three-dimensional images?

A
scanning electron microscope and scanning tunneling microscope

B
transmission electron microscope and scanning electron microscope

C
scanning tunneling microscope and transmission electron microscope

D
compound light microscope and scanning electron microscope
Question 6
1 / -0

Adaptations result from interactions between organisms and their _______.

A
behavior

B
offspring

C
gene pool

D
environment
Question 7
1 / -0

Which of the following is a scalar quantity?

A
Displacement

B
Velocity

C
Acceleration

D
Distance

Solution

(D) Distance is the scalar quantity.
Question 8
1 / -0

The most outstanding contribution of G.N. Ramachandran in structural biology is

A
$$\alpha$$-helix structure of proteins

B
$$\beta $$-sheet structure of protein

C
Ramachandran plot

D
Both 1 and 2
Question 9
1 / -0

The molecular orbital theory is based on the principle of a linear combination of atomic orbitals. According to this approach when atomic orbitals of the atoms come closer, they undergo constructive interference as well as destructive interference giving molecular orbitals, i.e., two atomic orbitals overlap to form two molecular orbitals, one of which lies at a lower energy level (bonding molecular orbital). Each molecular orbital can hold one or two electrons in accordance with Pauli's exclusion principle and Hund's rule of maximum multiplicity. For molecules up to $$N_2$$, the order of filling of orbitals is:
47 0(15)+(18), (28)(28), TT (2px) = a (2py), o (2pz),* (2px)=* (2py),& (272)
and for molecules after N2, the order of filling is:
W (1s)(1s), o(25) (2s), o (2pz), A (2px)= + (2py), (2px)=* (2py), * (29)
bond order- bonding electrons - anti-bonding electrons)
Bond order gives the following intorniation:
IN414x2

A
band order is greater than zero. the molecule/ion exists otherwise not.

B
Tricher the bond order, higher is the hond dissociation energy.

C
Higher the bond order, grater is the bond stability.

D
Higher the bond order, shorter is the bond length.
Question 10
1 / -0

Which of the following is a unit of heat?

A
Fahrenheit

B
Energy

C
Joule

D
Celsius

Solution

(C) As heat is a form of energy so the unit of energy is Joule. So unit of heat is Joule.

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Re-Attempt Weekly Quiz Competition

Basic Science Test 23

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Basic Science Test 23

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SHARING IS CARING

Question 1

Nucleus

Chromosomes

Mitochondria

All of the above

Question 2

Steel shot weighs about one-third less than lead shot.

Steel shot produces a larger pattern than lead shot.

Steel shot is softer and denser than lead shot.

Steel shot is more unstable in flight than lead shot.

Question 3

Middle lamella

Primary cell wall

Secondary cell wall

Cell membrane

Question 4

Spin

Break

Inertia

None

Question 5

scanning electron microscope and scanning tunneling microscope

transmission electron microscope and scanning electron microscope

scanning tunneling microscope and transmission electron microscope

compound light microscope and scanning electron microscope

Question 6

behavior

offspring

gene pool

environment

Question 7

Displacement

Velocity

Acceleration

Distance

Solution

Question 8

$$\alpha$$-helix structure of proteins

$$\beta $$-sheet structure of protein

Ramachandran plot

Both 1 and 2

Question 9

band order is greater than zero. the molecule/ion exists otherwise not.

Tricher the bond order, higher is the hond dissociation energy.

Higher the bond order, grater is the bond stability.

Higher the bond order, shorter is the bond length.

Question 10

Fahrenheit

Energy

Joule

Celsius

Solution

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