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During translation in eukaryotes, anticodons a. never bind to the mRNA codons.

During translation in eukaryotes, anticodons a. never bind to the mRNA codons. b. assist in the assembly of fats. c. consist of a five-nucleotide sequence at one end of the transfer RNA molecule. d. ensure that each amino acid is delivered to its proper “address” on the mRNA.

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During translation in eukaryotes, anticodons a. never bind to the mRNA codons.

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  1. During translation in eukaryotes, anticodons a. never bind to the mRNA codons. b. assist in the assembly of fats. c. consist of a five-nucleotide sequence at one end of the transfer RNA molecule. d. ensure that each amino acid is delivered to its proper “address” on the mRNA.

  2. All of the following are true about the structure of DNA except a. short strands of DNA are contained in chromosomes inside the nucleus of a cell. b. every DNA nucleotide contains a sugar, a phosphate group, and a base. c. DNA consists of two strands of nucleotides joined by hydrogen bonds. d. the long strands of nucleotides are twisted into a double helix.

  3. Chargaff’s rules, or the base-pairing rules, state that in DNA a. the amount of adenine equals the amount of thymine. b. the amount of guanine equals the amount of cytosine. c. the amount of guanine equals the amount of thymine. d. Both a and b

  4. ATTG : TAAC :: a. AAAT : TTTG b. GTCC : CAGG c. TCGG : AGAT d. CGAA : TGCG

  5. The attachment of nucleotides to form a complementary strand of DNA a. is catalyzed by DNA polymerase. b. is accomplished only in the presence of tRNA. c. prevents separation of complementary strands of RNA. d. is the responsibility of the complementary DNA mutagens.

  6. The enzymes responsible for adding nucleotides to the exposed DNA template bases are a. replicases. b. helicases. c. DNA polymerases. d. nucleotidases.

  7. The function of rRNA is to a. synthesize DNA. b. form ribosomes. c. synthesize mRNA. d. transfer amino acids to ribosomes.

  8. Which of the following types of RNA carries instructions for making proteins? a. mRNA b. tRNA c. rRNA d. All of the above

  9. RNA differs from DNA in that RNA a. is sometimes single-stranded. b. contains a different sugar molecule. c. contains the nitrogen base uracil. d. All of the above

  10. Transfer RNA acts as an “interpreter” because it a. carries an amino acid to its correct codon. b. synthesizes amino acids as they are needed. c. produces codons to match the correct anticodons. d. converts DNA into mRNA.

  11. During transcription a. proteins are synthesized. b. RNA is produced. c. DNA is replicated. d. translation occurs.

  12. Each nucleotide triplet in mRNA that specifies a particular amino acid is called a a. mutagen. b. anticodon. c. codon. d. exon.

  13. During translation, the amino acid detaches from the transfer RNA molecule and attaches to the end of a growing protein chain when a. the ribosomal RNA anticodon binds to messenger RNA codon. b. the transfer RNA anticodon binds to the messenger RNA codon. c. a “stop” codon is encountered. d. the protein chain sends a signal through the nerve cells to the brain.

  14. A DNA subunit composed of a phosphate group, a five-carbon sugar, and a nitrogen-containing base is called a(n) ________. • The process by which DNA copies itself is called ____________________. • The enzyme responsible for making RNA is called ____________________.

  15. The form of ribonucleic acid that carries genetic information from the DNA to the ribosome is ___. • Messenger RNA is produced during the process of… • Nucleotide sequences of tRNA that are complementary to codons on mRNA are called____.

  16. The information contained in a molecule of messenger RNA is used to make protein during the process of ____________________. • During translation, amino acids are brought to the ribosomes by molecules of _________________.

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