Preview Science Concepts Math Skills Using Science Graphics

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2. 1. During protein synthesis, transfer RNA (tRNA) • A. produces a new RNA molecule. • acts as a “start” signal for protein synthesis. C. produces protein subunits by translating the codons on mRNA. • D. delivers the instructions for making a protein to the site of translation.

3. 1. During protein synthesis, transfer RNA (tRNA) • A. produces a new RNA molecule. • acts as a “start” signal for protein synthesis. C. produces protein subunits by translating the codons on mRNA. • D. delivers the instructions for making a protein to the site of translation.

4. 2. Erwin Chargaff’s data on nitrogenous bases F. suggested that DNA bases are paired. G. suggested that DNA was a tightly coiled helix. H. suggested that bases are found in equal amounts in DNA. J. proved that DNA’s structure was similar to a twisted ladder.

5. 2. Erwin Chargaff’s data on nitrogenous bases F. suggested that DNA bases are paired. G. suggested that DNA was a tightly coiled helix. H. suggested that bases are found in equal amounts in DNA. J. proved that DNA’s structure was similar to a twisted ladder.

6. 3. The immediate result of a mistake in transcription would most likely be A. a different cell. B. a different gene. C. a different protein. D. a different set of alleles.

7. 3. The immediate result of a mistake in transcription would most likely be A. a different cell. B. a different gene. C. a different protein. D. a different set of alleles.

8. 4. Which part of a nucleotide contains genetic information? F. sugar molecules G. nitrogen base pairs H. phosphate molecules J. deoxyribose molecules

9. 4. Which part of a nucleotide contains genetic information? F. sugar molecules G. nitrogen base pairs H. phosphate molecules J. deoxyribose molecules

10. 5. DNA analysis reveals that a piece of DNA contains 40% adenine. What percentage of the DNA bases in a piece of DNA is guanine? A. 20% B. 60% C. 40% D. 10%

11. 5. DNA analysis reveals that a piece of DNA contains 40% adenine. What percentage of the DNA bases in a piece of DNA is guanine? A. 20% B. 60% C. 40% D. 10%

12. Use the diagram shown below to answer the next question. 6. What is the function of the structure labeled A? F. separating DNA strands G. reconnecting DNA strands H. checking the new DNA strands for errors J. adding nucleotides to make new DNA strands

13. Use the diagram shown below to answer the next question. 6. What is the function of the structure labeled A? F. separating DNA strands G. reconnecting DNA strands H. checking the new DNA strands for errors J. adding nucleotides to make new DNA strands

14. Use the diagram shown below to answer the next question. 7. What is the control variable in this experiment? A. No hormone B. Hormone A C. Hormone B D. Hormone A+B

15. Use the diagram shown below to answer the next question. 7. What is the control variable in this experiment? A. No hormone B. Hormone A C. Hormone B D. Hormone A+B

16. 8. What can you conclude about the effect Hormone B has on the rate of gene transcription compared to the control treatment? F. It increases gene transcription rate. G. It decreases gene transcription rate. H. It does not change gene transcription rate compared to the control. J. It has a smaller effect on transcription rate than Hormone A does.

17. 8. What can you conclude about the effect Hormone B has on the rate of gene transcription compared to the control treatment? F. It increases gene transcription rate. G. It decreases gene transcription rate. H. It does not change gene transcription rate compared to the control. J. It has a smaller effect on transcription rate than Hormone A does.