166523
During protein synthesis in an organism at one point the process comes to a halt. Select the group of the three codons from the following, from which any one of the three could bring about this halt.
1 UUU, UCC, UAU
2 UUC, UUA, UAC
3 UAG, UGA, UAA
4 UUG, UCA, UCG
Explanation:
During chain termination, some codons function as non-sense codons or terminators which provide stop signals for the end of m-RNA chain synthesis. - UAG(Amber), UGA (Opal) and UAA (Ochre) are termination codons. If these codons are present in m-RNA, the protein synthesis stops abruptly where the protein synthesis is complex or not.
AIIMS-2006
Molecular Basis of Inheritance and
166524
Which of the following is correct regarding genetic code?
1 UUU is the initiation codon which also codes for phenylalanine.
2 There are 64 triplet codons and only 20 amino acids.
3 Three random nitrogen bases specify the placement of one amino acid.
4 UAA is the nonsense codon which also codes for methionine.
Explanation:
The nucleotide triplet that encodes an amino acid is called a codon. - Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids the code is degenerate. - The adaptor molecule for translation is tRNA. - A charged tRNA has an amino acid at one end and at other end it has on anticodon for matching a codon in the mRNA. So there are 64 triplet codons and only 20 amino acids.
AIIMS-2010
Molecular Basis of Inheritance and
166525
Choose the correct statement.
1 Transcription and translation occur in same compartment for prokaryotes
2 Monocistonic RNA-more than one structural genes under single promoter
3 Introns and exons both code for protein synthesis
4 In prokaryotes, splicing and tailing occurs before translation.
Explanation:
In prokaryotes, the transcription and translation occur in same compartment. - There is no separation between cytoplasm and nucleus. In prokaryotes, transcription and translation take place in the same compartment. Also translation can begin much before the mRNA is fully transcribed. Therefore, transcription and translation are combined and prokaryotes do not need to undergo splicing, capping and tailing.
AIIMS-25.05.2019 Shift-I
Molecular Basis of Inheritance and
166526
The binding site of tRNA with mRNA and amino acids respectively are-
1 mRNA with DHU loop and amino acid with CCA end
2 mRNA with CCA end and amino acid with anticodon loop
3 mRNA with anticodon loop and amino acid with DHU loop
4 mRNA with anticodon loop and amino acid with CCA end
Explanation:
mRNA with anticodon loop and amino acid with CCA end. Anticodon loop is the binding site for mRNA and CCA end or acceptor stem is the binding site for an amino acid.
166523
During protein synthesis in an organism at one point the process comes to a halt. Select the group of the three codons from the following, from which any one of the three could bring about this halt.
1 UUU, UCC, UAU
2 UUC, UUA, UAC
3 UAG, UGA, UAA
4 UUG, UCA, UCG
Explanation:
During chain termination, some codons function as non-sense codons or terminators which provide stop signals for the end of m-RNA chain synthesis. - UAG(Amber), UGA (Opal) and UAA (Ochre) are termination codons. If these codons are present in m-RNA, the protein synthesis stops abruptly where the protein synthesis is complex or not.
AIIMS-2006
Molecular Basis of Inheritance and
166524
Which of the following is correct regarding genetic code?
1 UUU is the initiation codon which also codes for phenylalanine.
2 There are 64 triplet codons and only 20 amino acids.
3 Three random nitrogen bases specify the placement of one amino acid.
4 UAA is the nonsense codon which also codes for methionine.
Explanation:
The nucleotide triplet that encodes an amino acid is called a codon. - Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids the code is degenerate. - The adaptor molecule for translation is tRNA. - A charged tRNA has an amino acid at one end and at other end it has on anticodon for matching a codon in the mRNA. So there are 64 triplet codons and only 20 amino acids.
AIIMS-2010
Molecular Basis of Inheritance and
166525
Choose the correct statement.
1 Transcription and translation occur in same compartment for prokaryotes
2 Monocistonic RNA-more than one structural genes under single promoter
3 Introns and exons both code for protein synthesis
4 In prokaryotes, splicing and tailing occurs before translation.
Explanation:
In prokaryotes, the transcription and translation occur in same compartment. - There is no separation between cytoplasm and nucleus. In prokaryotes, transcription and translation take place in the same compartment. Also translation can begin much before the mRNA is fully transcribed. Therefore, transcription and translation are combined and prokaryotes do not need to undergo splicing, capping and tailing.
AIIMS-25.05.2019 Shift-I
Molecular Basis of Inheritance and
166526
The binding site of tRNA with mRNA and amino acids respectively are-
1 mRNA with DHU loop and amino acid with CCA end
2 mRNA with CCA end and amino acid with anticodon loop
3 mRNA with anticodon loop and amino acid with DHU loop
4 mRNA with anticodon loop and amino acid with CCA end
Explanation:
mRNA with anticodon loop and amino acid with CCA end. Anticodon loop is the binding site for mRNA and CCA end or acceptor stem is the binding site for an amino acid.
166523
During protein synthesis in an organism at one point the process comes to a halt. Select the group of the three codons from the following, from which any one of the three could bring about this halt.
1 UUU, UCC, UAU
2 UUC, UUA, UAC
3 UAG, UGA, UAA
4 UUG, UCA, UCG
Explanation:
During chain termination, some codons function as non-sense codons or terminators which provide stop signals for the end of m-RNA chain synthesis. - UAG(Amber), UGA (Opal) and UAA (Ochre) are termination codons. If these codons are present in m-RNA, the protein synthesis stops abruptly where the protein synthesis is complex or not.
AIIMS-2006
Molecular Basis of Inheritance and
166524
Which of the following is correct regarding genetic code?
1 UUU is the initiation codon which also codes for phenylalanine.
2 There are 64 triplet codons and only 20 amino acids.
3 Three random nitrogen bases specify the placement of one amino acid.
4 UAA is the nonsense codon which also codes for methionine.
Explanation:
The nucleotide triplet that encodes an amino acid is called a codon. - Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids the code is degenerate. - The adaptor molecule for translation is tRNA. - A charged tRNA has an amino acid at one end and at other end it has on anticodon for matching a codon in the mRNA. So there are 64 triplet codons and only 20 amino acids.
AIIMS-2010
Molecular Basis of Inheritance and
166525
Choose the correct statement.
1 Transcription and translation occur in same compartment for prokaryotes
2 Monocistonic RNA-more than one structural genes under single promoter
3 Introns and exons both code for protein synthesis
4 In prokaryotes, splicing and tailing occurs before translation.
Explanation:
In prokaryotes, the transcription and translation occur in same compartment. - There is no separation between cytoplasm and nucleus. In prokaryotes, transcription and translation take place in the same compartment. Also translation can begin much before the mRNA is fully transcribed. Therefore, transcription and translation are combined and prokaryotes do not need to undergo splicing, capping and tailing.
AIIMS-25.05.2019 Shift-I
Molecular Basis of Inheritance and
166526
The binding site of tRNA with mRNA and amino acids respectively are-
1 mRNA with DHU loop and amino acid with CCA end
2 mRNA with CCA end and amino acid with anticodon loop
3 mRNA with anticodon loop and amino acid with DHU loop
4 mRNA with anticodon loop and amino acid with CCA end
Explanation:
mRNA with anticodon loop and amino acid with CCA end. Anticodon loop is the binding site for mRNA and CCA end or acceptor stem is the binding site for an amino acid.
NEET Test Series from KOTA - 10 Papers In MS WORD
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Molecular Basis of Inheritance and
166523
During protein synthesis in an organism at one point the process comes to a halt. Select the group of the three codons from the following, from which any one of the three could bring about this halt.
1 UUU, UCC, UAU
2 UUC, UUA, UAC
3 UAG, UGA, UAA
4 UUG, UCA, UCG
Explanation:
During chain termination, some codons function as non-sense codons or terminators which provide stop signals for the end of m-RNA chain synthesis. - UAG(Amber), UGA (Opal) and UAA (Ochre) are termination codons. If these codons are present in m-RNA, the protein synthesis stops abruptly where the protein synthesis is complex or not.
AIIMS-2006
Molecular Basis of Inheritance and
166524
Which of the following is correct regarding genetic code?
1 UUU is the initiation codon which also codes for phenylalanine.
2 There are 64 triplet codons and only 20 amino acids.
3 Three random nitrogen bases specify the placement of one amino acid.
4 UAA is the nonsense codon which also codes for methionine.
Explanation:
The nucleotide triplet that encodes an amino acid is called a codon. - Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids the code is degenerate. - The adaptor molecule for translation is tRNA. - A charged tRNA has an amino acid at one end and at other end it has on anticodon for matching a codon in the mRNA. So there are 64 triplet codons and only 20 amino acids.
AIIMS-2010
Molecular Basis of Inheritance and
166525
Choose the correct statement.
1 Transcription and translation occur in same compartment for prokaryotes
2 Monocistonic RNA-more than one structural genes under single promoter
3 Introns and exons both code for protein synthesis
4 In prokaryotes, splicing and tailing occurs before translation.
Explanation:
In prokaryotes, the transcription and translation occur in same compartment. - There is no separation between cytoplasm and nucleus. In prokaryotes, transcription and translation take place in the same compartment. Also translation can begin much before the mRNA is fully transcribed. Therefore, transcription and translation are combined and prokaryotes do not need to undergo splicing, capping and tailing.
AIIMS-25.05.2019 Shift-I
Molecular Basis of Inheritance and
166526
The binding site of tRNA with mRNA and amino acids respectively are-
1 mRNA with DHU loop and amino acid with CCA end
2 mRNA with CCA end and amino acid with anticodon loop
3 mRNA with anticodon loop and amino acid with DHU loop
4 mRNA with anticodon loop and amino acid with CCA end
Explanation:
mRNA with anticodon loop and amino acid with CCA end. Anticodon loop is the binding site for mRNA and CCA end or acceptor stem is the binding site for an amino acid.
