Which statements are true? Explain why or why not.1 The consequences of errors in transcription areless severe than those of errors in DNA replication.2 Since introns are largely genetic “junk,” they do nothave to be removed precisely from the primary transcriptduring RNA splicing.3 Wobble pairing occurs between the first positionin the codon and the third position in the anticodon.4 During protein synthesis, the thermodynamics ofbase-pairing between tRNAs and mRNAs sets the upperlimit for the accuracy with which protein molecules aremade.5 Protein enzymes are thought to greatly outnum-ber ribozymes in modern cells because they can catalyzea much greater variety of reactions and all of them havefaster rates than any ribozyme.
Gene Interactions
When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.
Gene Expression
Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.
Which statements are true? Explain why or why not.
1 The consequences of errors in transcription are
less severe than those of errors in
2 Since introns are largely genetic “junk,” they do not
have to be removed precisely from the primary transcript
during RNA splicing.
3 Wobble pairing occurs between the first position
in the codon and the third position in the anticodon.
4 During protein synthesis, the
base-pairing between tRNAs and mRNAs sets the upper
limit for the accuracy with which protein molecules are
made.
5 Protein enzymes are thought to greatly outnum-
ber ribozymes in modern cells because they can catalyze
a much greater variety of reactions and all of them have
faster rates than any ribozyme.
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