NEET Test 148

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NEET Test 148

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Weekly Quiz Competition

Question 1
4 / -1

The name of drug used in cancer treatment produced by biotechnology is:

A
Interferon

B
Human Growth Hormone (HGH)

C
Thyroid Stimulating Hormone (TSH)

D
Insulin

Solution

The name of the drug used in cancer treatment produced by biotechnology is interferon. Interferons are a family of naturally-occurring proteins that are made and secreted by cells of the immune system. Interferons can promote or hinder the ability of some cells to differentiate i.e., to become specialized in their function. They can inhibit cell division, which is one reason why they hold promise for stopping cancer growth. Commercially available interferons are human interferons manufactured using recombinant DNA technology.
Question 2
4 / -1

Which of the following statements is true?

A
The direction of osmosis depends upon pressure gradient, but the rate of osmosis is independent of the pressure gradient.

B
The external pressure applied to help in the diffusion of water is osmotic pressure.

C
Numerically, the osmotic pressure is greater than osmotic potential.

D
Osmotic pressure has a positive sign and osmotic potential has a negative sign.

Solution

The symbol π is called osmotic pressure and Ψs is called osmotic potential. That is, π has positive values, and Ψs has negative values. "Osmotic pressure" is the term that physical chemists, zoologists, and many others use to denote the effect of dissolved solutes on the free energy of water.
Question 3
4 / -1

A compound can release 20% of oxygen by mass on heating. How much compound is needed if 800 g of oxygen is to be released?

A
4 kg

B
5 kg

C
2 kg

D
2.5 kg

Solution
Question 4
4 / -1

A shell is fired from a gun from the bottom of a hill along its slope. The slope of the hill is α =30^∘. And the angle of the barrel to the horizontal β = 60^∘. The initial velocity v of the shell is 21 m/sec. Then the distance of a point from the gun at which shell will fall:

A
10 m

B
20 m

C
30 m

D
40 m

Solution

Take x and y - axis as shown in the figure. Let shell falls at point A on the incline along y- direction.
Question 5
4 / -1

What is the function of the filiform apparatus?

A
Guide the entry of pollen tube

B
Recognize the suitable pollen at the stigma

C
Produce nectar

D
Stimulate division of the generative cell

Solution

A filiform apparatus' function is to guide pollen tubes' entry, extract food from the nucleus, and help metabolites at short distances. The filiform apparatus is a finger-like projection, a highly thickened structure formed from synergid cell walls at the micropylar.
Question 6
4 / -1

A boxer moves his head backward while he receives a punch to the head. This is done to:

A
increase the contact time and avoid getting hurt

B
decrease the contact time and avoid getting hurt

C
create confusion to the opponent

D
to increase the momentum
Solution
Linear momentum:

Linear momentum is the impact caused due to a body in translational motion.

The greater the mass and velocity of the moving body the more will be the impact and thus greater the momentum.

The linear momentum of a moving object is defined as:

p = mv

Where,

p is the linear momentum, m is the mass of the object, and v is the velocity of the object.

According to Newton's second law of motion, the rate of change of momentum is directly proportional to the force applied by the moving body.

Explanation:
- The boxer experiences momentum due to the punch on the head.
- On moving the head backward, he increases the time of contact.
increasing the time of contact for the same momentum decreases the force acting on his head.
- This will help in reducing the force acting on his head and helps avoid injury or getting hurt.
Question 7
4 / -1

What is the shape of the

A
Linear

B
Bent shape with bond angle of about 90^o

C
Bent shape with bond angle of about 109^o

D
Bent shape with bond angle of about 120^o

Solution
Question 8
4 / -1

There is no DNA in:

A
Mature RBC

B
Mature spermatozoan

C
Root hair

D
Antipodal cells

Solution

Red blood cells are the most common type of blood cell and delivering oxygen to the body tissues via the blood. There is no DNA in mature RBC. The reticulocyte is the immediate precursor of the mature RBC and, within 24 hours of release into the peripheral circulation, evolves into the mature RBC and losses its nucleus.
Question 9
4 / -1

BOD test measures:

A
The amount of O₂ in the water

B
The amount of CO₂ in the water

C
The amount of phosphate in the water

D
The amount of sulphur in water

Solution

Biological Oxygen Demand (BOD) is a measure of the oxygen used by microorganisms to decompose this waste in the water.

BOD measurement requires taking two samples at each site. One is tested immediately for dissolved oxygen, and the second is incubated in the dark at 20 C for 5 days and then tested for the amount of dissolved oxygen remaining.
Question 10
4 / -1

The breakdown of polymers into monomers is known as

A
Elimination

B
Hydrolysis

C
Dissociation

D
Condensation

Solution

Polymers are broken down into monomers in a process known as hydrolysis, which means “to split water,” a reaction in which a water molecule is used during the breakdown. During these reactions, the polymer is broken into two components. If the components are un-ionized, one part gains a hydrogen atom (H) and the other gains a hydroxyl group (OH) from a split water molecule. This is what happens when monosaccharides are released from complex carbohydrates via hydrolysis.