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Biology Class 9th And 10th Online MCQs Test
Q.1: Which statement is true about an aqueous medium——–?
- Ionic as well as non ionic substance in aqueous media retains their identity
- Enzymes can not perform catalysis reaction in this medium
- Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions
- It is less favorable media for chemical reactions
C
Q.2: Which of the following carbohydrate is tasteless——?
- Monosaccharide
- Oligosaccharide
- Polysaccharide
- None of these
C
Q.3: Which of the statement is not true for compounds like glycoprotein and glycolipids——?
- They are conjugated molecules of carbohydrates
- Both have role in the extra cellular matrix of animals and bacterial cell wall
- They are components of biological membranes.
- Both are produced and secreted by endoplasmic reticulum
D
Q.4: A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called—–?
- Lipid
- Carbohydrate
- Protein
- Carotein
B
Q.5: Specific heat of vaporization of water is——–?
- 574 Kcal/kg
- 674 Kcal/kg
- 774 Kcal/kg
- 874 Kcal/kg
A
Q.6: Cn(H2O)n. is a general formula of——-?
- Monosaccharides
- Oligosaccharides
- Ploysacharides
- Carbohydrates
D
Q.7: Which one are most complex sugar——-?
- Monosaccharides
- Oligosaccharides
- Polysaccharides
- None of these
C
Q.8: Variety among amino acids is produced due to——-?
- NH2 group
- COOH group
- R group
- All of these
C
Q.9: Primary structure of proteins determines—–?
- Number of polypeptide chains involved
- Bending of polypeptide chains
- Amino acid sequence
- Coiling of polypeptide chains
C
Q.10: Ribose is an example of——?
- Trioses
- Tetroses
- Pentose
- Hexose
C