A novel species with double-stranded genetic material consists of 5 bases namely P , Q , R , S , T , with percentage given below. P Q R S T Percentage 22 28 22 12 16 Based on the above information, which one of the following inferences is not supported by the observations?

S base pairs with T and Q base pairs with R

S base pairs with Q and T base pairs with Q

P base pairs with R and S base pairs with Q

P base pairs with R and T base pairs with Q

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Earn 100

Difference between nucleoside and nucleotide ?

Important Questions on Biomolecules

MEDIUM

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Watson and Crick model of DNA is

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

According to Watson-Crick model, hydrogen bonding in a double-stranded DNA occurs between

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

If a double-stranded

DNA

has

15 %

cytosine, what is the

%

of adenine in the

DNA

?

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Optical activity of DNA is due to its:

MEDIUM

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Write the names of two nucleic acids.

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Which of the following statements is correct?

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

If a dsDNA has 20% adenine, what would be its cytosine content?

HARD

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

A novel species with double-stranded genetic material consists of

5

bases namely

P, Q, R, S, T,

with percentage given below.

	$P$	$Q$	$R$	$S$	$T$
Percentage	$22$	$28$	$22$	$12$	$16$

Based on the above information, which one of the following inferences is not supported by the observations?

HARD

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Radioisotopes are frequently used in the study of cellular processes. A culture of Escherichia coli is grown at

37 ° C

in a minimal medium containing radioactive phosphorous. At the end of

48

hours, the amount of radioactivity expected in equimolar quantities of the following macromolecules is

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Which of the following biomolecules does have a phosphodiester bond?

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

In the polynucleotide chain of

DNA

, a nitrogenous base is linked to the

- OH

of:

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Identify the chemical components of nucleic acid

A) Cysteine
B) Heterocyclic compound
C) Tyrosine
D) Phosphoric acid
E) Ribulose
F) Monosaccharide

HARD

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

DNA molecule has length of $476 \overset{\circ}{A}$ with $20 %$ guanosine. Choose the correct features of $DNA$

$I)$ $56 CTP$
$II)$ $336$ Hydrogen bonds
$III)$ Total $150$ nucleotides
$IV)$ $84 TTP$

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Which one of the following is the complementary sequence for the DNA with

5^{'} - C G T A C T A - 3^{'}

MEDIUM

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

DNA molecule which has the highest number of hydrogen bonds

HARD

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

A bacteriophage

T 2

particle contains within its head a double-stranded

B

-from DNA of molecular weight

1.2 \times 10^{8} Da .

Assume that the head of a

T 2

Phage particle is of

210 nm

in length and the average molecular weight of a nucleotide is

330 Da .

The length of the

T 2

genome is in the range of

MEDIUM

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Match the following lists:

	List $I$		List $II$
A)	X-ray diffraction data	$I)$	Chargaff
B)	DNA double stranded	$II)$	Meischer
C)	DNA double helix	$III)$	Wilkins
D)	DNA as an acidic substance	$IV)$	Watson $&$ Crick

The correct match is

MEDIUM

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

In sea urchin DNA, which is double-stranded,

17 %

of the bases were shown to be cytosine. What are the percentages of other three bases expected to be present in this DNA?

EASY

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

The protein

P

, the oligosaccharide

O

, and the oligonucleotide

N

are composed of

100

amino acid residues,

100

hexose residues and

100

nucleotides, respectively. Which one of the following orders of molecular weights is correct?

MEDIUM

Biology>Cell : Structure and Functions>Biomolecules>Biomolecules in the Cell: Nucleic Acids

Choose the correct statements:
A) DNA directly codes for the synthesis of proteins
B) DNA and RNA both can function as genetic material
C) DNA is storage of genetic material and RNA transfers genetic information
D) RNA is indirectly codes for the synthesis of protein

Difference between nucleoside and nucleotide ?

Important Questions on Biomolecules

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