Quiz DNA %CODE1% Javascript not enabled Name: Quiz DNA True/False Indicate whether the sentence or statement is true or false. TF 1. Despite years of research, the actual structure of the DNA molecule is still unknown. TF 2. Franklin’s X-ray diffraction images suggested that the DNA molecule resembled a tightly coiled spring, a shape called a helix. TF 3. In all living things, DNA replication must occur after cell division. TF 4. Multiple DNA polymerases may become attached to more than one portion of a DNA molecule at once, speeding up the rate of replication. TF 5. Before a DNA molecule can replicate itself, it must make itself more compact. This is accomplished by the double helix coiling up on itself. Completion Complete each sentence or statement. 6. A DNA subunit composed of a phosphate group, a five-carbon sugar, and a nitrogen-containing base is called a(n) ____________________. 7. The name of the five-carbon sugar that makes up a part of the backbone of molecules of DNA is ____________________. 8. Watson and Crick determined that DNA molecules have the shape of a(n) ____________________. 9. Due to the strict pairing of nitrogen base pairs in DNA molecules, the two strands are said to be ____________________ to each other. 10. According to base-pairing rules, adenine pairs with ____________________ and guanine pairs with ____________________. 11. The enzyme that is responsible for replicating molecules of DNA by attaching complementary bases in the correct sequence is ____________________. 12. Enzymes called ____________________ are responsible for unwinding the DNA double helix by breaking the hydrogen bonds that hold the complementary strands together. 13. The process by which DNA copies itself is called ____________________. 14. Molecules of ____________________ carry instructions for protein synthesis from the nucleus to the cytoplasm. 15. The nitrogen-containing base that is found only in RNA is ____________________. 16. The enzyme responsible for making RNA is called ____________________. 17. The form of ribonucleic acid that carries genetic information from the DNA to the ribosomes is ____________________.
Quiz Genetics %CODE1% Javascript not enabled Name: Genetics True/False Indicate whether the sentence or statement is true or false. TF 1. Genetics is the branch of biology that involves the study of how different traits are transmitted from one generation to the next. TF 2. Mendel discovered predictable patterns in the inheritance of traits. TF 3. The scientific study of heredity is called genetics. TF 4. In Mendel’s experiments with the flower color of pea plants, only the parental generation produced white flowers. TF 5. Mendel concluded that the patterns of inheritance are determined entirely by the environment. TF 6. The law of independent assortment was proposed by Mendel to explain his observations of inheritance patterns. TF 7. Genes on chromosomes are the units of inheritance. TF 8. The allele for a recessive trait is usually represented by a capital letter. TF 9. Heterozygous individuals have two of the same alleles for a particular gene. TF 10. A probability of 1/4 is equal to a probability of 75 percent. TF 11. The dominant allele for tallness in pea plants is represented by the letter t. TF 12. In codominance, two alleles are expressed at the same time. TF 13. All genes have only two alleles. TF 14. A dihybrid cross involves two pairs of contrasting traits. TF 15. Crosses involving a study of one gene are called monohybrid crosses. Completion Complete each sentence or statement. 16. A reproductive process in which fertilization occurs within a single plant is ____________________. 17. Mendel produced strains of pea plants through the process of ____________________. 18. ____________________ refers to the transmission of traits from parent to offspring in sexually reproducing organisms. 19. In heterozygous individuals, only the ____________________ allele achieves expression. 20. A trait that is not expressed in the F1 generation resulting from the crossbreeding of two genetically different, true-breeding organisms is called ____________________. 21. The principle that states that one factor may mask the effect of another factor is the principle of ____________________. 22. In Mendel’s experiments, a trait that disappeared in the F1 generation but reappeared in the F2 generation was always a ____________________. 23. The cellular process that results in the segregation of Mendel’s factors is ____________________. 24. Mendel formulated two principles known as the laws of ____________________. 25. An organism that has two identical alleles for a trait is called ____________________. 26. An organism’s ____________________ refers to the set of alleles it has inherited. 27. The likelihood that a specific event will occur is called ____________________. In pea plants, tallness (T) is dominant to shortness (t). Crosses between plants with these traits can be analyzed using a Punnett square similar to the one shown below. T t T 1 2 t 3 4 28. Refer to the illustration above. The parents shown in the Punnett square could have offspring with a genotype ratio of ____________________. 29. Refer to the illustration above. The phenotype of the plant that would be represented in box “4” of the Punnett square would be ____________________. 30. A cross involving two pairs of contrasting traits is a(n) ____________________ cross.
Quiz Protein Synthesis %CODE1% Name: Protein Synthesis Completion Complete each sentence or statement. 1. In eukaryotes, gene expression is related to the coiling and uncoiling of ____________________. 2. A DNA subunit composed of a phosphate group, a five-carbon sugar, and a nitrogen-containing base is called a(n) ____________________. 3. The name of the five-carbon sugar that makes up a part of the backbone of molecules of DNA is ____________________. 4. Knowing the order of the bases in a gene permits scientists to determine the exact order of the amino acids in the expressed ____________________. 5. Due to the strict pairing of nitrogen base pairs in DNA molecules, the two strands are said to be ____________________ to each other. 6. According to base-pairing rules, adenine pairs with ____________________ and guanine pairs with ____________________. 7. The enzyme that is responsible for replicating molecules of DNA by attaching complementary bases in the correct sequence is ____________________. 8. Enzymes called ____________________ are responsible for unwinding the DNA double helix by breaking the hydrogen bonds that hold the complementary strands together. 9. The process by which DNA copies itself is called ____________________. 10. Molecules of ____________________ carry instructions for protein synthesis from the nucleus to the cytoplasm. 11. The nitrogen-containing base that is found only in RNA is ____________________. 12. The enzyme responsible for making RNA is called ____________________. 13. The form of ribonucleic acid that carries genetic information from the DNA to the ribosomes is ____________________. 14. A ____________________ is a sequence of DNA at the beginning of a gene that signals RNA polymerase to begin transcription. 15. Messenger RNA is produced during the process of ____________________. 16. Of the 64 codons of mRNA, 61 code for ____________________, 3 are ____________________ signals, and one is a ____________________ signal. 17. Nucleotide sequences of tRNA that are complementary to codons on mRNA are called ____________________. 18. The sequence of three nucleotides that code for specific amino acids or stop signals in the synthesis of protein is called a(n) ____________________. 19. The information contained in a molecule of messenger RNA is used to make protein during the process of ____________________. 20. During translation, amino acids are brought to the ribosomes by molecules of ____________________.
Safety quiz %CODE1% Safety Quiz Check your knowledge of lab safety! 1. When you find an unlabeled bottle of chemical in the lab, you should: Smell it to see what it is Ask your teacher Waft the chemical Pour it down the drain 2. If you break a beaker in the lab, the first thing you should do is: Tell your teacher Clean up the glass Put the broken glass in a separate container labeled broken glass Carefully use your hands to pick up the largest pieces 3. When you complete your lab work, which of the following should you not do: Clean & return materials to the lab cart Try your own experiment Turn in all lab work to your teacher Return to your own seat 4. Which of the following procedures is not correct: Add acid to water Pipette by mouth Keep flammables away from open flames Never used chipped glass 5. What is the most important thing to do before starting a lab: Put on goggles Put on your lab apron Pick up your materials from the lab cart Read the entire lab 6. When heating liquids in test tubes: Always tightly cork the test tube hold the test tube pointing upward Hold test tubes at a slant pointed away from everyone None of the above 7. Which of the following is true about heating glass: Only use glassware marked Kimex Only use glassware marked Pyrex Both A & B are correct Always ask the teacher if the container can be heated 8. Which of the following is correct lab procedure: Place heated glassware on countertops away from the edge Hold dissecting specimens tightly with your hand when cutting with a scalpel Wear gloves when dissecting & dispensing irritating chemicals Pour excess chemical back into its original container 9. Which of the following statements is correct: Never use cracked glassware Wash hands before & after dissecting Treat all chemicals as poisonous All of the above 10. When inserting glass tubing into stoppers: Use glycerin & a twisting motion Hold the stopper tightly as you push the glass tubing into it Insert the tubing into the stopper under water Always ask your teacher to insert the glass tubing for you BACK
Seed Plants %CODE1% Name: Seed Plants True/False Indicate whether the sentence or statement is true or false. TF 1. Tracheids and sieve tubes make up a xylem vessel. TF 2. The main function of ground tissue is to conduct water and minerals. TF 3. Vascular tissue is found within ground tissue, which makes up the outside of the plant. TF 4. The outer protective layer of tissue on a vascular plant is known as the meristem. TF 5. Monocot stems cannot become large in diameter because they lack lateral meristems. TF 6. The loss of water by transpiration at the leaves helps pull water into the plant at the roots. TF 7. The blade of a compound leaf is divided into leaflets. TF 8. Many gymnosperms, such as pine, spruce, and fir trees, produce their seeds in cones. TF 9. The flowers of angiosperms are ornamental and have no reproductive function. TF 10. Brightly colored petals, scents, and nectar are all adaptations of flowers that help ensure pollination. TF 11. Plants with colorful flowers are pollinated most commonly by wind. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ABCD 12. The conducting cells of phloem are called a. tracheids. c. sieve plates. b. sieve tube members. d. vessel elements. ABCD 13. Plants grow in regions of active cell division called a. meristems. c. phloem. b. xylem. d. dermal tissue. ABCD 14. The lengthening of plant roots and shoots is called a. secondary growth. c. primary growth. b. germination. d. vascular growth. ABCD 15. Refer to the illustration above. The structure indicated at “f” a. supports the anther. b. produces pollen. c. has tiny structures that look like leaves. d. develops into a fruit. ABCD 16. Refer to the illustration above. The structure labeled “c” a. produces pollen. c. is sticky to the touch. b. contains sperm cells. d. contains meristematic tissue. ABCD 17. The process of transferring pollen from a male cone to a female cone in gymnosperms is called a. fertilization. c. pollination. b. seed formation. d. asexual reproduction. ABCD 18. If a plant’s flowers are very colorful and produce nectar, the plant is probably pollinated by a. water. c. insects. b. wind. d. self-pollination. ABCD 19. Fertilization a. involves the union of the egg and sperm. b. may not follow pollination at all. c. may not occur until weeks or months after pollination has taken place. d. All of the above ABCD 20. After an egg has been fertilized, a fruit develops from the a. style. c. ovule. b. ovary. d. sepal.
