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The temporary IUPAC name given to element 102 was Unnilbium. What is its official IUPAC name?
From Table 3.5, the element with atomic number 102 has the temporary IUPAC name Unnilbium and the official IUPAC name Nobelium.
What is the ending suffix added to the sequence of numerical roots when naming elements with Z > 100 according to IUPAC guidelines?
The NCERT text explicitly states: 'The roots are put together in order of digits which make up the atomic number and 'ium' is added at the end.'
Which of the following describes the primary structure of a protein during denaturation?
According to the NCERT text, 'During denaturation secondary and tertiary structures are destroyed but primary structure remains intact.' This means the sequence of amino acids linked by peptide bonds is not broken in denaturation.
What is the common consequence of subjecting a native protein to a physical change like increased temperature or a chemical change like altered pH?
The NCERT states, 'When a protein in its native form, is subjected to physical change like change in temperature or chemical change like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturation of protein.'
Which of the following events occur during the denaturation of a protein?
The NCERT text explicitly mentions, 'When a protein in its native form, is subjected to physical change like change in temperature or chemical change like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity.'
Which of the following is an example of protein denaturation?
The NCERT provides, 'The coagulation of egg white on boiling is a common example of denaturation.'
Curdling of milk is an example of protein denaturation. What causes this denaturation?
The NCERT states, 'Another example [of denaturation] is curdling of milk which is caused due to the formation of lactic acid by the bacteria present in milk.' This change in lactic acid affects the pH leading to denaturation.
What is typically preserved in a protein undergoing denaturation?
The NCERT explicitly mentions, 'During denaturation secondary and tertiary structures are destroyed but primary structure remains intact.'
High temperature destroys enzymatic activity because:
From the 'Factors Affecting Enzyme Activity' section, it is stated, 'Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat.'
A native protein refers to a protein with:
The NCERT defines it as, 'Protein found in a biological system with a unique three-dimensional structure and biological activity is called a native protein.'
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