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- 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 RNAWhich is not a nucleotide base in DNA? a. adenine c. glutamine e. cytosine b. guanine d. thymine f. All are in DNA.One species DNA differs from others in its _______. a. nucleotides c. double helix b. DNA sequence d. sugar-phosphate backbone
- The 3’ end of DNA molecule refers to a(n) __________ that can form a phosphodiester bond (a) OH group (b) phosphate group (c) nitrogenous base (d) enzyme (e) hydrogenA......of a DNA consists of a sugar, a phosphate, and a nitrogen containing base. A....... is a change in the base sequence of a DNA molecule Took x-ray images of DNA molecule Name 3 types of RNA and list their roles in making proteinsOne way to determine how closely related two species are is to analyze _____, which determines the amino acid sequence of proteins.a. DNAb. carbohydratesc. mutationsd. fingerprints
- Explain why scientists preferred proteins as the source of genetic material over DNA. A. DNA seemed too simple of a molecule compared to proteins B. Proteins are made up of combinations of 20 different amino acids compared to DNA's 4 bases. The larger number seemed more likely to account for all the variety and diversity in organisms. C. Scientists knew more about proteins than they did DNA. D. All of the answers are correct explanations.A molecule of RNA has 400 nucleotides and 110 guanines. How many adenines does it have? A.110 B.0 C.90 D.400 E.180which statement is incorrect? 1.DNA lacks uracil nitrogen base 2.none 3.DNA IS UNIVERSAL molecule carrying genetic information in all creatures 4. sugar of DNA molcule lacks one -OH group
- A double-stranded DNA molecule has 500 nucleotides and 100 cytosines. How many uracils does it have? A. 400 B.500 C.150 D.0 E.300DNA molecules are made of small units called nucleotide. Which of the following is not part of a nucleotideA new type of nucleic acid molecule is found have a base composition of 29% adenine, 19% thymine, 21% cytosine and 31% guanine. The molecule is probably: a. single stranded DNA b. double stranded RNA c. double stranded DNA d. single stranded RNA
