Biology Biomolecules - Online Test
Q1. The nucleic acids that behave like enzymes are called as
Answer : Option C
Explaination / Solution:
Almost all enzymes are proteins. There are some nucleic acids that behave like enzymes. These are called ribozymes.
Q2. Nucleic acids are serve as
Answer : Option D
Explaination / Solution:
Nucleic acids carry hereditary information and are passed on from parental generation to progeny.
Q3. The exoskeleton of arthropods have
Answer : Option B
Explaination / Solution:
Exoskeletons of arthropods, have a complex polysaccharide called chitin. These complex polysaccharides are heteropolymers.
Q4. DNA differ from RNA in having
Answer : Option A
Explaination / Solution:
DNA differ from RNA in having Thymine. Thymine is absent in RNA. RNA contain uracil in place of thymine.
Q5. Double helix model of DNA was proposed by proposed by
Answer : Option C
Explaination / Solution:
Double helix model of DNA was proposed by James Watson and Francis Crick in 1953 based on X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin.
Q6. Length of DNA with 23 base pairs is
Answer : Option C
Explaination / Solution:
The distance between two base pairs in DNA is 3.4 . The length of DNA with 23 base pairs is 23x 3.4 = 78.2 .
Q7. DNA and RNA resemble each other in possessing
Answer : Option B
Explaination / Solution:
Both DNA and RNA consists of polymers of nucleotides. RNA is single stranded but DNA is double stranded. DNA polynucleotide contains thymine but RNA polynucleotide contains uracil.
Q8. Base pairs found in 5 turns of DNA spirals are
Answer : Option C
Explaination / Solution:
Each turn of DNA spirals contains 10 base pairs. So, in five turns of DNA total number of Base pair is 5×10=50 base pairs.
Q9. Plants can synthesis all types of fatty acids but animals lacks machinery to synthesis three fatty acids called essential fatty acids. They are
Answer : Option A
Explaination / Solution:
Plants can synthesis all types of fatty acids but animal cells lacks machineryto synthesis three fatty acids called as essential fatty acids. These are Linoleic , Linolenic and Arachidonic acids
Q10. The formation of both peptide and glycosidic bonds involves
Answer : Option C
Explaination / Solution:
In a polypeptide or a protein, amino acids are linked by a peptide bond which is formed when the carboxyl (-COOH) group of one amino acid reacts with the amino (-NH2) group of the next amino acid with theelimination of a water moiety (the process is called dehydration). In polysaccharide the individual monosaccharides are linked by a glycosidic bond. This bond is also formed by dehydration.
