Help Please! DNA and RNA are both information carrying molecules that are essential to all forms of life today.But what is the property of RNA that makes us think it was the first of these two molecules to evolve?O A. Unlike DNA, RNA uses the nucleotide uracil and not thymine.O B. Unlike DNA, RNA can fold into complex shapesO c. Unlike DNA, RNA can directly interact with proteins.D. Unlike DNA, RNA is much more reactive.

Nucleic acids The two main types of nucleic acids are DNA and RNA. Both DNA and RNA are made from…

DNA and RNA are both information carrying molecules that are essential to all forms of life today. But what is the property of RNA that makes us think it was the first of these two molecules to evolve? A. Unlike DNA, RNA uses the nucleotide uracil and not thymine. B. Unlike DNA, RNA can fold into complex shapes O C. Unlike DNA, RNA can directly interact with proteins. D. Unlike DNA, RNA is much more reactive.

DNA and RNA are both information carrying molecules that are essential to all forms of life today. But what is the property of RNA that makes us think it was the first of these two molecules to evolve? A. Unlike DNA, RNA uses the nucleotide uracil and not thymine. B. Unlike DNA, RNA can fold into complex shapes O C. Unlike DNA, RNA can directly interact with proteins. D. Unlike DNA, RNA is much more reactive.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter9: Molecular Biology

Section: Chapter Questions

Problem 6RQ: A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA...

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A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA nucleotides c. a protein that binds to DNA d. an enzyme that synthesizes RNA
Energy that drives translation is provided mainly by ______ . a. ATP c. GTP b. amino acids d. ribosomes
Which is not a nucleotide base in DNA? a. adenine c. glutamine e. cytosine b. guanine d. thymine f. All are in DNA.
RNA in ribosome catalyzes formation of peptide bonds in all organisms. This supports the hypothesis that______. a. RNA can hold more information than DNA b. RNA is more stable than DNA c an RNA world existed prior to the rise of DNA d. proteins evolved before RNA
RNA differs from DNA because: a. RNA may contain the pyrimidine uracil, and DNA does not. b. RNA is always single-stranded when functioning, and DNA isalways double-stranded. c. the pentose sugar in RNA has one less O atom than thepentose sugar in DNA. d. RNA is more stable and is broken down by enzymes lesseasily than DNA. e. RNA is a much larger molecule than DNA.
Working on the Amazon River, a biologist isolated DNA from two unknown organisms, P and Q. He discovered that the adenine content of P was 15% and the cytosine content of Q was 42%. This means that: a. the amount of guanine in P is 15%. b. the amount of guanine and cytosine combined in P is 70%. c. the amount of adenine in Q is 42%. d. the amount of thymine in Q is 21%. e. it takes more energy to unwind the DNA of P than theDNA of Q.
One species DNA differs from others in its _______. a. nucleotides c. double helix b. DNA sequence d. sugar-phosphate backbone
_______ are removed from new mRNAs. a. Introns c. Poly-A tails b. Exons d. Amino acids
Energy that drives the attachment of a nucleotide to the end of a growing strand of DNA comes from ________. a. the nucleotide b. DNA polymerase c. phosphate-group transfers from ATP
Chemical analysis shows that a nucleic acid sample contains A, U, C, and G. Is this DNA or RNA? Why?
The genetic code is defined as a series of _______________ in _______________. (a) anticodons; tRNA (b) codons; DNA (c) anticodons; mRNA (d) codons; mRNA (e) codons and anticodons; rRNA
A certain mRNA strand has the following nucleotide sequence: 5AUGACGUAUAACUUU3 What is the anticodon for each codon? What is the amino acid sequence of the polypeptide? (Use Figure 13-5 to help answer this question.) Figure 13-5 The genetic code The genetic code specifies all possible combinations of the three bases that compose codons in mRNA. Of the 64 possible codons, 61 specify amino acids (see Figure 3-17 for an explanation of abbreviations). The codon AUG specifies the amino acid methionine and also signals the ribosome to initiate translation (start). Three codonsUAA, UGA, and UAGdo not specify amino acids; they terminate polypeptide synthesis (stop).