Biology MCQs

Page No. 119

It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect?


aOlder sediment layers have equal amount of these radioactive isotopes as that of the young ones

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bOlder sediment layers have less amount of these radioactive isotopes as that of the young ones.

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cOlder sediment layers have greater amount of these radioactive isotopes as that of the young ones.

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dOlder sediment layers did not have these radioactive isotopes

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Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the ?


aConcentration of water molecules inside and outside the cell

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bConcentration of enzymes on either side of the cell membrane

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cRate of molecular motion on either side of the cell membrane

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dNone of these

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Most cell membranes are composed principally of ?


aDNA ad protein

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bProtein and Lipids

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cProtein and Chitin

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dProtein and RNA

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View Answer Protein and Lipids

Which of the following pathogen type cause disease that can be treated with antibiotics ?


abacteria

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bfungi

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cvirus

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dnone of these

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View Answer bacteria

The evaporative cooling in the respiratory tract of dogs is called?


aVasodilation

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bVasoconstriction

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cPanting

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dAll of these

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View Answer Panting

Production of sweat and sebum is related with ?


aSkin

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bLiver

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cLungs

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dGIT

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View Answer Skin

In animals coordination is achieved by means of?


aNervous system

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bEndocrine system

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cRespiratory system

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dBoth A and B

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View Answer Both A and B

Haemodialysis means cleaning of____________?


aUrine

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bBlood

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cGlomerular filterate

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dCoelomic fluid

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View Answer Blood

A structure formed by groups of similar cells organized into loose sheets or bundles performing similar functions is called as:


aAn organ

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bAn organism

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cA Tissue

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dA Cell

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View Answer A Tissue

Which one of them is a micro-molecule?


aPolysaccharide

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bProtein

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cHemoglobin

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dATP

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View Answer ATP

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