Pyrimidine

Q. If following is the sequence of nucleotides in mRNA, predict the sequence of amino acid coded by it (take help of the checkerboard): -AUG UUU UUC UUC UUU UUU UUC

Q. How many hydrogen bonds are present in a DNA duplex, if one chain of DNA has sequence ATTAGC?

1. 12
2. 10
3. 14
4. 16

Q. 3'-AAATGCGCCATA-5’ is the sequence of nucleotides on a gene. After transcription the sequence of nucleotides in the mRNA formed from it and the sequence of nucleotides in the corresponding coding strand of DNA will be

1. 5'-UAU-GUT-CCA-UUU-3' and 5'AUA-CAU-GGU-AAA-3'
2. 5'-UUU-ACG-CGG-UAU-3' and 5'TTT-ACG-CGG-TAT-3'
3. 5'-UAU-CGC-GCA-UUU-3' and 5'AUA-GCG-CGU-AAA-3'
4. 5'-UUU-ACC-TUG-UAU-3' and 5'AAA-UGG-UAC-AUA-3'

Q. The antisense strand of a segment of DNA has the following sequence.
3’-AGGTATCCCATC-5’.
What will be the corresponding sequence of the mRNA transcribed from this segment of DNA?

1. 5’-AGGUAUCCCAUC-3’
2. 3’-UGGTUTCGCATT-5’
3. 3’-ACCUAUGCGAUC-5’
4. 5’-UCCAUAGGGUAG -3’

Q. Which one of the following pairs of the nitrogenous base of nucleic acids, is wrongly matched with the category mentioned against it?

1. Thymine, uracil - Pyrimidines
2. Uracil, cytosine - Pyrimidines
3. Adenine, thymine - Purines
4. Guanine, adenine - Purines

Q. During eukaryotic transcription, a nucleotide is incorporated into the growing RNA chain with the help of

1. Hydrogen bond
2. Ionic bond
3. Phosphodiester bond
4. Phosphoester bond

Q.

The purine bases are:

1. C and T

2. C and U

3. A and G

4. T and U

Q. Which of the following DNA stands would dissociate at the highest temperature from its complementary strand?

1. AGCTCAAGTA
2. TCTCATCATG
3. ATATATAGCA
4. CTGGCCAGTT

Q. Which of the following elements is not present in a nitrogenous base?

1. Hydrogen
2. Carbon
3. Phosphorus
4. Nitrogen

Q. Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?

1. Guanine, Adenine - Purines
2. Adenine, Thymine - Purines
3. Thymine, Uracil - Pyrimidines
4. Uracil, Cytosine - Pyrimidines

Q. Lac operon has

1. Y genes
2. Z genes
3. A genes
4. all the above

Q. Which one of the following pairs of the nitrogenous base of nucleic acids, is wrongly matched with the category mentioned against it?

1. Thymine, uracil - Pyrimidines
2. Uracil, cytosine - Pyrimidines
3. Guanine, adenine - Purines
4. Adenine, thymine - Purines

Q. Choose the correct answer from the alternatives given :
If the sequence of bases in one strand of DNA is ATGCATGCA, what would be the sequence of bases on Complimentary strand?

1. ATGCATGCA
2. AUGCAUGCA
3. TACGTACGT
4. UACGUACGU

Q. How does the pyrimidine composition change between DNA and RNA?

1. DNA is mostly made up of pyrimidines
2. DNA has Thymine and RNA has Uracil
3. DNA has Uracil and RNA has Thymine
4. None of the above

Q. How does the pyrimidine composition change between DNA and RNA?

1. DNA is mostly made up of pyrimidines
2. DNA has Thymine and RNA has Uracil
3. DNA has Uracil and RNA has Thymine
4. None of the above

Q. Which of the following Nitrogen bases possesses double ring structure?

1. Cytosine
2. Thymine
3. Adenine
4. Uracil

Q. The following diagrams represent nitrogen bases of nucleic acids. Identify correct combinations

1. a-uracil, b-guanine, c-cytosine, d-adenine, e-thymine
2. a-uracil, b-adenine, c-thymine, d-guanine, e-cytosine
3. a-thymine, b-adenine, c-cytosine, d-guanine, e-uracil
4. a-uracil, b-guanine, c-thymine, d-adenine, e-cytosine

Q. If percentage of cytosine is 18%, then percentage of thymine will be

1. 32%
2. 36%
3. 23%.
4. 64%

Q. The following diagrams represent the nitrogenous base of nucleic acid molecules. Identify the correct combination.

1. a= Uracil, b= Adenine, c= Thymine, d= Guanine, e= Cytosine
2. a= Uracil, b= Guanine, c= Cytosine, d= Adenine, e= Thymine
3. a= Thymine, b= Adenine, c= Cytosine, d= Guanine, e= Uracil
4. a= Uracil, b= Guanine, c= Thymine, d= Adenine, e= Cytosine

Q. Adenine is a
(a) nitrogen base
(b) pentose sugar
(c) fatty acid
(d) enzyme

Q. Which of following base pair is wrong?

1. G-C
2. A-T
3. A-C
4. A-U

Q. What is the meaning of nucleotide synthesis??

Q. Which one of the following pairs of the nitrogenous base of nucleic acids, is wrongly matched with the category mentioned against it?

1. Thymine, uracil - Pyrimidines
2. Uracil, cytosine - Pyrimidines
3. Guanine, adenine - Purines
4. Adenine, thymine - Purines

Q.

If the sequence of bases in DNA is ATTCGATG then the sequence of bases in its transcript will be

1. GUAGCUUA

2. AUUCGAUG

3. CAUCGAAU

4. UAAGCUAC

Q.

If the sequence of bases in DNA is ATTCGATG then the sequence of bases in its transcript will be

1. GUAGCUUA

2. AUUCGAUG

3. CAUCGAAU

4. UAAGCUAC

Q. How does the pyrimidine composition change between DNA and RNA?

1. DNA has Uracil and RNA has Thymine
2. DNA has Thymine and RNA has Uracil
3. None of the above
4. DNA is mostly made up of pyrimidines

Q.

1. Deletion mutation
2. Start codon at the 5' end
3. Palindromic sequence of base pairs
4. Replication completed