Question

Bacteria and Archaea have introns in their tRNA genes but not in their genes encoding mRNAs....

Bacteria and Archaea have introns in their tRNA genes but not in their genes encoding mRNAs. Why?

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Introns are the non-coding regoins present in a gene or RNA transcript. In bacteria and Archea, introns can be found in genes that code for proteins, rRNA and also tRNA. After transcription, the immature or pre-mRNA generated, undergoes a modification process called RNA splicing. RNA splicing is the removal (splicing out) of introns by cleavage at certain conserved sequences i.e. Splice sites. tRNA introns are removed by an enzyme called tRNA splicing endonuclease. Thus the mRNA (mature mRNA) consists only of Exons, and not Introns. This is necessary before the mRNA goes for translation for generation of protein. In order for the mRNA to encode a protein with the correct sequence, introns are removed.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
which of the following is not a difference between Archaea and Bacteria? a) presence of histone...
which of the following is not a difference between Archaea and Bacteria? a) presence of histone in DNA b) presence of peptidoglycan c) lack of a nucleus d) presence introns in genes e)inhibition by the antibiotics chloramphenicol and streptomycin.
describe how environmental pressures might have contributed to differences in bacteria and archaea
describe how environmental pressures might have contributed to differences in bacteria and archaea
Which of the following microorganisms can have a largely proteinaceous cell wall? bacteria prokaryotes eukaryotes archaea...
Which of the following microorganisms can have a largely proteinaceous cell wall? bacteria prokaryotes eukaryotes archaea bacteria and eukaryotes
Human genes are routinely expressed in bacteria to produce clotting factors, hormones, etc. Which of the...
Human genes are routinely expressed in bacteria to produce clotting factors, hormones, etc. Which of the following must be altered for bacteria to successfully synthesize human proteins? Check all that apply. Promoter of the gene Translation start site Introns Exons Terminator of the gene
Why did scientists separate Bacteria into Domain Eubacteria and Domain Archaea? Rather than one Domain with...
Why did scientists separate Bacteria into Domain Eubacteria and Domain Archaea? Rather than one Domain with all prokaryotes.
Which genes are found on either side of TAS2R38? How do their gene structures (e.g. introns...
Which genes are found on either side of TAS2R38? How do their gene structures (e.g. introns and exons) differ from that of TAS2R38? What do several of the more distant genes have in common structurally with TAS2R38? Propose an explanation for the origin of these similar genes.
part 8 Which statement is TRUE about genes? A. promoter marks the end of a gene...
part 8 Which statement is TRUE about genes? A. promoter marks the end of a gene B. genes are located on chromosomes C. genes can function as enzymes D. all parts of a gene is copied RNA One of the reasons why a cell would activate a gene only if its product is required, is; A. to prevent telomere shortening B. to minimize mutations C. for fast response D. to conserve energy Most point mutations that could cause genetic disorders...
1. Moderately repeated sequences are known to code for: a. tRNAs b. mRNAs c. rRNAs d....
1. Moderately repeated sequences are known to code for: a. tRNAs b. mRNAs c. rRNAs d. lipids e. a,b,andc 2. What process is generally thought to produce gene duplication? a. equal crossing over b. unequal crossing over c. translation d. Cut & paste transposons e. Spliceosome 3. The globin gene cluster contains stretches of DNA that are homologous to the sequences of functional globin genes but contain severe accumulated mutations that render them nonfunctional. Most of these noncoding regions have...
Which of the following describes the phylogenic relationships between the three domains? a. Bacteria and archaea...
Which of the following describes the phylogenic relationships between the three domains? a. Bacteria and archaea are more closely related to each other than Eukarya b. Archaea is the most ancestral of the domains, bacteria is closest to Eukarya c. Eukarya is the most ancestral domain, while archaea is the most recent one d. Bacteria is the most ancestral domain, followed by archaea and then Eukarya 2. Human papillomavirus (HPV) is very common males and females. Although most infections are...
Introns are known to contain stop codons (UAA, UGA, or UAG), yet these codons do not...
Introns are known to contain stop codons (UAA, UGA, or UAG), yet these codons do not interrupt the coding of a particular protein. Why? a. More than one stop codon is needed to stop transcription. b. Exons are spliced out of mRNA before translation. c. These triplets do not cause termination in gene expression. d. Stop codons are only required for termination of mRNA synthesis. e. Introns are removed from mRNA before translation A(n) _____ is located upstream of a...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT