Biology Biomolecules - Online Test
Q1. Number of fatty acid residues found in one molecules of fat is
Answer : Option D
Explaination / Solution:
Fat consists of molecules of fatty acids and molecules of glycerin. Each molecule of fat contain three molecules of fatty acids and one molecule of glycerine.
Q2. In most fungi the structural polysaccharide of cell wall is ------
Answer : Option D
Explaination / Solution:
In most fungi the structural polysaccharide of cell wall is chitin. In plant cells cell wall is made up of cellulose.
Q3. Which of the following nitrogenous base produces nucleoside only with ribose sugar?
Answer : Option D
Explaination / Solution:
Uracil nitrogenous base is produces nucleoside only with ribose sugar. This nucleoside is present only inside the RNA and absent in DNA.
Q4. The plant cell wall are made up of
Answer : Option B
Explaination / Solution:
Plant cell walls are made of cellulose. Paper made from plant pulp is cellulose.
Q5. The nucleotide chemical components are
Answer : Option A
Explaination / Solution:
The nucleotide has three chemically distinct components. One is a heterocyclic compound, the second is a monosaccharide and the third a phosphoric acid or phosphate.
Q6. Which of the following carries the hereditary information from parents to progeny?
Answer : Option C
Explaination / Solution:
Nucleic acids carry hereditary information and are passed on from parental generation to progeny.
Q7. Identify the correct pairing between nitrogen bases in DNA.
Answer : Option C
Explaination / Solution:
There are two hydrogen bonds between A and T pairing. There are three hydrogen bonds between G andC pairing. Each strand appears like a helical staircase.
Q8. A polysaccharide present as storehouse of energy of plant tissues
Answer : Option B
Explaination / Solution:
Starch is a variant of this but present as a store house of energy in plant tissues.
Q9. Which is the most abundant chemical for the living organisms?
Answer : Option D
Explaination / Solution:
Water is the most abundant chemical for the living organisms.
In adult men, about 60% of their bodies are water.
Q10. Which of the following statements are not correct?
Answer : Option D
Explaination / Solution:
A nucleic acid containing deoxyribose is called deoxyribonucleic acid (DNA) while that which contains ribose is called ribonucleic acid (RNA).
