NEET Biology MCQ: NCERT DNA Percentage Calculation | NEET.Guide Questions

In a DNA, percentage of thymine is $20\%$ what is the percentage of guanine?

A

$20\%$

B

$40\%$

C

$30\%$

D

$50\%$

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :DNA structure, Chargaff's rules, base pairing

Related Questions

Which histone protein is NOT a core component of the nucleosome?

A

H2A

B

H2B

C

H3

D

H1

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎓 Ncert Level:Remembering

🎯Difficulty :Hard

⚡ Time Required :1 mins

🔄Ncert Concepts :DNA Packaging, Histones

Which of the following sugars is found in nucleic acid?

A

Glucose

B

Fructose

C

Both ribose and deoxyribose

D

Sucrose

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎓 Ncert Level:Remembering

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Biochemistry, Nucleic Acids, Sugars, Deoxyribose

Which of the following nitrogenous bases are purines found in both DNA and RNA?

A

Adenine and Guanine

B

Cytosine and Thymine

C

Uracil and Thymine

D

Guanine and Uracil

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

PYQ YEAR: 2019

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Nitrogenous bases, Purines, DNA, RNA

The contribution of cytoplasmic DNA in cell’s total DNA is?

A

$65\,\%$

B

$1 - 5\,\%$

C

$10 - 12\,\%$

D

$0 - 0.5\,\%$

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Cell Biology, DNA, Cytoplasmic DNA

5-Methyl Uracil, another chemical name for?

A

Uracil

B

Thymine

C

Adenine

D

Guanine

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :biochemistry, nucleic acids, nucleotide bases

In a DNA, percentage of thymine is $20\%$ what is the percentage of guanine?

A

$20\%$

B

$40\%$

C

$30\%$

D

$50\%$

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :2 mins

🔄Ncert Concepts :DNA structure, Chargaff's rules, base pairing

If a DNA molecule contains 22% Thymine, what is the percentage of Guanine?

A

22%

B

28%

C

30%

D

44%

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

PYQ YEAR: 2021

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :DNA, Chargaff's Rule, Base Pairing

A bacterial strain has a mutation in the gene encoding DNA gyrase. Which antibiotic would likely be ineffective against this strain?

A

Penicillin

B

Tetracycline

C

Ciprofloxacin

D

Erythromycin

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :1 mins

🔄Ncert Concepts :DNA Replication, Antibiotics, Bacterial Genetics

The double helix model of Watson and Crick is known as

A

C-DNA

B

B-DNA

C

Z-DNA

D

D-DNA

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎓 Ncert Level:Remembering

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :DNA structure, Watson-Crick model, DNA forms

If the distance between two consecutive base pairs is ${\rm{0}}{\rm{.34}}\,{\rm{nm}}$ and the total number of base pairs of a DNA double helix in a typical mammalian cell is $\;6.6\,\, imes \,\,{10^9}\,bp$ then the length of the DNA is approximately

A

${\rm{2}}{\rm{.0}}$ meters

B

${\rm{2}}{\rm{.5}}$ meters

C

${\rm{2}}{\rm{.2}}$ meters

D

${\rm{2}}{\rm{.7}}$ meters

Question Tags

📚 Subject:Botany

📑 Chapter:Molecular Basis of Inheritance

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :unit conversion, multiplication, scientific notation

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