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.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter18: Life's Origin And Early Evolution

Section: Chapter Questions

Problem 5SA: RNA in ribosome catalyzes formation of peptide bonds in all organisms. This supports the hypothesis...

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The Miller experiment did not create life, nor did the gases used resemble Earth’s first atmosphere as we presently understand it. The experiment was important because it a. showed that complex organic molecules can form under a variety of circumstances. b. synthesized the carbon atom. c. produced a DNA by-product that eventually leads to RNA and other bases. d. produced RNA, which later formed proteins out of the amino acids. e. synthesized the four bases needed for the production of DNA.
In the context of chemical evolution, DNA's structure is interesting because it suggests a possible copying mechanism. What about DNA's structure facilitates copying? A. The strands of the double helix are complementary. B. DNA always goes from 5' to 3'. C. It has the same number of purines and pyrimidines. D. The nitrogenous bases are located on the inside of the double helix.
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
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
Which event contradicts the central dogma of molecular biology? a. Poly-A polymerase enzymes process mRNA in the nucleus. b. Endonuclease enzymes splice out and repair damaged DNA. c. Scientists use reverse transcriptase enzymes to make DNA from RNA. d. Codons specifying amino acids are degenerate and universal.
What is different between RNA and DNA? a. Only rna has adenine b. Only dna forms hydrogen bonds beteeen complementary regions c. Ribose has a 2' OH group unlike deoxyribose d. DNA uses uracil as a base
Which of the following is not true with respect to DNA? a. A nucleic acid that contains the genetic instructions used in the development and functioning of all modern living organisms. b. The helix geometry of DNA is of B-Form. DNA is completely protected by the body, i.e., the body destroys enzymes that cleave DNA. DNA can be damaged by exposure to Ultra-violet rays. c. The pairing of bases: A-T (Adenine-Thymine), G-C (Guanine-Cytosine) d. Consists of a deoxyribose sugar, a phosphate backbone, four bases: adenine, guanine, cytosine and uracil. e. None of the above
How do the sugars of RNA and DNA differ? a. RNA has a six-carbon sugar; DNA has a five-carbon sugar. b. The sugar of RNA has a hydroxyl group that is not found in the sugar of DNA. c. RNA contains uracil; DNA contains thymine. d. DNA’s sugar has a phosphorus atom; RNA’s sugar does not.
DNA sequences can act as "tape measures of evolution". Scientists analyzing the human genome sequence were surprised to find that some regions of the human genome that are most highly conserved (similar to comparable regions in other species) don't code for proteins at all. Given what you've learned about "genes" speculate on reasons why this might be so.
If RNA played a key role in the origin of life,why do cells now use DNA for information storage and proteins to carry out other cellular processes?
What did the Miller-Urey experiment demonstrate? A. Life originated in outer space and was brought to Earth on a meteor. B. Complex molecules can be formed from water, carbon dioxide, methane, ammonia, and hydrogen gas in a reducing atmosphere. C. Eukaryotic cells evolved from prokaryotic cells following an endosymbiotic event. D. RNA was the genetic storage merial before DNA.
. Which of the following statements best summarizes the differences between DNA and RNA? A) DNA is transcribed using RNA polymerase to form mRNA and mRNA is translated by the Ribosome to form a polypeptide, B) The bases in DNA contain sugars, whereas the bases in RNA do not contain sugar. C) DNA nucleotides contain a different glucose compared to RNA nucleotides. D) DNA is formed using the base uracil, whereas RNA uses the base thymine. E) DNA encodes the sequence of amino acids for the primary structure of a polypeptide whereas mRNA does not