CBSE
Multiple Choice QuestionsThe function of 'sodium pump' is a biological process operating in each and every cell of all animal. Which of the following biologically important ions is also a constituent of this pump?
Ca2+
Mg2+
K+
Fe2+
Which one given below is a non - reducing sugar?
Lactose
Glucose
Sucrose
Sucrose
Which one of the following statements is not true regarding (+) lactose?
(+) lactose is a β - glycoside formed by the union of a molecule of D (+) galactose
(+) lactose is a reducing sugar and does not exhibit mutarotation
(+) lactose, C12H22O11 contains 8 - OH groups
(+) lactose, C12H22O11 contains 8 - OH groups
D-(+)- glucose reacts with hydroxylamine and yields an oxime. The structure of the oxime.The structure of the oxime would be
Which one of the following statement is incorrect about enzyme catalysis?
Enzymes are mostly proteinous in nature
Enzyme action is specific
Enzymes are denaturated by ultraviolet rays and at high temperature
Enzymes are denaturated by ultraviolet rays and at high temperature
In a protein molecule various amino acids are linked together by
peptide bond
dative bond
dative bond
Deficiency of vitamin B1 causes the disease
convulsions
beri-beri
cheilosis
cheilosis
Which of the following statement is false?
Ca2+ ions are important in blood clotting
Ca2+ ions are not important in maintaining the regular beating of the heart.
Mg2+ ions are important in the green parts of plants
Mg2+ ions are important in the green parts of plants
Which one of the following sets of monosaccharides forms sucrose?
The correct statement regarding RNA and DNA, respectively is
The sugar component in RNA is ribose and sugar component in DNA is 2' deoxyribose
The sugar component in RNA is arabinose and the sugar component in DNA is ribose
The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose
The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose
