NEET Test 47

The advantage of having both eyes on the front are- a) visual information comes at the same time from both the eyes, the field of vision is not different. b) Both eyes at the front help primates in calculating distances, depth perception which helped in climbing or jumping through depths. c) The brain puts the visual information together in the form of a 3D-image due to the binocular vision. 
The exception of this is the field of vision of 2 eyes is different.

The introns (non-coding regions) contain repeated sequences of base pairs known as VNTR’s/ Variable number Of Tandem Repeats. These repeated sequences contain upto 100 base pairs. VNTR’s are of 2 types, microsatellite sequences and minisatelite sequence. The microsatellite sequences are 1-6bp repeat regions. Minisatelites sequences are 11-60bp repeat units.

Short Tandem Repeats or STR’s are stretches of DNA containing repeating tandem units of 2-7 nucleotide in length.

The hind gut is also known as proctodaeum. It includes the anal canal and anus.

• Full expansion of the lungs does not take place after the first inspiration and is achieved only after a short time of birth.
• Crying helps the expansion of the chest and lungs.
• After the first inspiration, the lungs don’t completely empty the air drawn inside, and lungs remain slightly expanded.

Light: maximum rate of photosynthesis in red light, followed by blue light and poor in green light.

Red light promotes carbohydrate synthesis blue light promotes protein synthesis. Light saturation point is 800 ft candles. Maximum photosynthesis occurs at saturation point. That is at 10% of full sunlight.

We know that if the current is constant, electric power is directly proportional to electric resistance. Thus, 60 W lamp offers more resistance than 20 W lamp.

Consider a laptop, to which a power of 60 W is to be delivered via charging cable having resistance of 0.25 Ω to be dissipated by it finally. 
If 20 V is the voltage across laptop and I is the current through it, 
P = VI 
∴ I = P/V = 60/20 = 3 A 
Hence, Power dissipated in the charging cable will be 
P’ = I²R = (3)² × 0.25 = 2.25 W

Here charge on electron, e = 1.6 × 10⁻¹⁹ 
Power of one motor = 24 W 
Operating voltage of one motor = 12 V 
We know that, 
P = VI 
I = P/V = 2 A 
Now, charge passing through one motor in one second: 
q = I × t = 2 × 1 = 2 C (t = 1s) 
Therefore, number of electrons moving through one motor 
N = q/e = 2 / 1.6 × 10⁻¹⁹ = 1.25 × 10¹⁹ 
Now number of electrons passing through 4 motors will be = 4 × 1.25 × 10¹⁹ = 5 × 10¹⁹

A sequence of three nucleotides in messenger RNA makes a codon for an amino acid because four bases in messenger RNA adenine, cytosine, guanine and uracil have been shown to act in the form of triplet.