Everyday Science MCQs

Page No. 103

Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere?


aCarbon dioxide


bChlorofluorocarbons


cNitrogen oxides


dMethane


View Answer Chlorofluorocarbons

Fuse wire is made of_____________?


a63% tin and 37% lead


b63% lead and 37% tin


c63% tin and 37% aluminum


d63% lead and 37% aluminum


View Answer 63% tin and 37% lead

The approximate intensity level of the sound which can cause damage to the ear drum is?


a20 dB


b60 dB


c100 dB


d160 dB


View Answer 100 dB

What is the smallest unit of heredity?


aChromosomes


bGene


cNucleotides


dnone


View Answer Gene

When a patient’s immune system becomes reactive to a drug, this is an example of?


aSuper infection


bDrug resistance


cAllergy


dnone


View Answer Allergy

The shape of the external ear is due to____________?


aElastic cartilage


bFibrocartilage


cArticular cartilage


dnone


View Answer Elastic cartilage

Which of these is not a region of the spinal cord?


aThoracic


bPelvic


cLumbar


dnone


View Answer Pelvic

The damage to the_________nerve could result in the defect of the eye movement:


aOptic


bTrigeminal


cAbducens


dnone


View Answer Abducens

The autonomic nervous system innervates all of these except?


aCardiac muscles


bSkeletal muscles


cSmooth muscles


dnone


View Answer Skeletal muscles

Serum if blood plasma minus its?


aCalcium ions


bClotting proteins


cGlobulin


dnone


View Answer Clotting proteins

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