DNA & PS Practice Test

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N & PS Practice Test 1. strand of N consists of thousands of smaller, repeating units known as 6. Knowledge of the structure of N is important in the study of life because N. lipids. amino acids. nucleotides.
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N & PS Practice Test 1. strand of N consists of thousands of smaller, repeating units known as 6. Knowledge of the structure of N is important in the study of life because N. lipids. amino acids. nucleotides. polysaccarides 2. Which nitrogenous base is normally present in N but absent from RN?. stores food. transmits genetic information. transmits chemical energy. stores enzymes. adenine. cytosine. thymine. guanine 7. Which two scientists proposed the double helix arrangement of this molecule 3. Which two bases are present in equal amounts in a double-stranded N molecule?. cytosine and thymine. adenine and thymine. adenine and uracil. cytosine and uracil 4. The N code for a particular amino acid contains a sequence of how many nucleotides? ased on structure, in what way do N molecules differ from RN molecules?. RN contains the base uracil; N does not contain uracil.. N is composed of two chains of nucleotides; RN is composed of three chains of nucleotides.. RN is helical; N is branched.. N is composed of four different bases; RN is composed of three different bases.. Hardy and Weinberg. arwin and Lamarck. Watson and rick. Mendel and e Vries 8. Select the nucleic acid molecules, chosen onsist of chains of nucleotides. N molecules, only. RN molecules, only. oth N and RN molecules. Neither N nor RN molecules page 1 9. Select the nucleic acid molecules, chosen arry genetic information from the nucleus to the ribosomes. N molecules, only. RN molecules, only. oth N and RN molecules. Neither N nor RN molecules 13. gene mutation is believed to involve. replacing deoxyribose with glucose. the substitution of a nitrogen base. hydrolysis of strong hydrogen bonds. replacing a phosphate with a nitrate 14. With respect to normal base pairing, when a molecule of N replicates, thymine will most likely pair with 10. Select the nucleic acid molecules, chosen Present in the nucleus of a cell. N molecules, only. RN molecules, only. oth N and RN molecules. Neither N nor RN molecules. adenine. cytosine. guanine. uracil 15. t which point would hydrogen bonding between two nitrogenous bases normally occur? Select the nucleic acid molecules, chosen May contain the four bases adenine, cytosine, guanine, and thymine 16. The N code for structure 1 is. N molecules, only. RN molecules, only. oth N and RN molecules. Neither N nor RN molecules 12. molecule of N is a polymer composed of. glucose. amino acids. fatty acids. nucleotides. U U U. T T T.. P H E page 2 N & PS Practice Test 17. Which statement is true regarding an alteration or change in N?. It is always known as a mutation.. It is always advantageous to an individual.. It is always passed on to offspring.. It is always detected by the process of chromatography. 18. Which event would most likely cause a change in a genetic sequence in an organism?. eating certain foods high in saturated fats. strenuous physical activity. exposure to radiation. a sudden exposure to cooler temperatures 20. small amount of N was taken from a fossil of a mammoth found frozen in glacial ice. Genetic technology can be used to produce a large quantity of identical N from this mammoth s N. In this technology, the original N sample is used to. stimulate differentiation in other mammoth cells. provide fragments to replace certain human body chemicals. act as a template for repeated replication. trigger mitosis to obtain new base sequences 21. Molecule 1 represents a segment of hereditary information, and molecule 2 represents the portion of a molecule that is determined by information from molecule uring the warm temperatures of summer, the arctic fox produces enzymes that cause its fur to become reddish brown. uring the cold temperatures of winter, these enzymes do not function. s a result, the fox has a white coat that blends into the snowy background. This change in fur color shows that. the genes of a fox are made of unstable N. mutations can be caused by temperature extremes. random alteration of N can occur on certain chromosomes. the expression of certain genes is affected by temperature What will most likely happen if there is a change in the first three subunits on the upper strand of molecule 1?. The remaining subunits in molecule 1 will also change.. portion of molecule 2 may be different.. Molecule 1 will split apart, triggering an immune response.. Molecule 2 may form two strands rather than one. page 3 N & PS Practice Test 22. The instructions for the traits of an organism are coded in the arrangement of 26. The diagram below represents a process that occurs during normal human development.. glucose units in carbohydrate molecules. bases in N in the nucleus. fat molecules in the cell membrane. energy-rich bonds in starch molecules 23. The N of a human cell can be cut and rearranged by using. a scalpel. electrophoresis. hormones. enzymes 24. Which statement best describes a chromosome?. It is a gene that has thousands of different forms.. It has genetic information contained in N.. It is a reproductive cell that influences more than one trait.. It contains hundreds of genetically identical N molecules. 25. If 15% of a N sample is made up of thymine, T, what percentage of the sample is made up of cytosine,?. 15%. 35%. 70%. 85% Which statement is correct regarding the cells and N?. ll the cells have identical N.. The N of the fertilized egg differs from the N of all the other cells.. The N of the fertilized egg differs from some, but not all, of the other cells.. Only the fertilized egg contains N. 27. Four different segments of a N molecule are represented below. There is an error in the N molecule in. segment 1, only. segment 3, only. segments 2 and 3. segments 2 and Which statement best describes a human chromosome?. It is made of amino acid subunits that form genes.. It contains genes that may code for the production of enzymes.. It is normally passed to the next generation through a placenta.. It varies in function from one generation to the next. page 4 N & PS Practice Test 29. N is able to control cellular activities most directly by regulating the process of 33. portion of a messenger RN molecule is represented by. meiotic division. protein synthesis. active transport. selective breeding The messenger RN codon for methionin is. T. U. TG. UG 30. The molecule represented by the lettered symbols shown is a 35. If the diagram represents a part of the process of protein synthesis, strand would. nucleotide. codon. triplet code. base pair 31. Which is the correct identification of the parts of the N nucleotide in the diagram shown?. serve as a template for the synthesis of messenger RN. =uracil, =deoxyribose, =thymine. =phosphate, =ribose, =uracil. =thymine, =ribose, =uracil. =phosphate, =deoxyribose, =thymine. carry a code determined by the original N molecule from the nucleus to the cytoplasm. pick up and transfer specific amino acids to the cytoplasm. pick up and transfer nucleic acids to the nucleus 32. portion of a N molecule is represented by page 5 N & PS Practice Test 36. The process represented in the diagram is. lipid digestion. cell respiration. protein synthesis. protein hydrolysis page 6 N & PS Practice Test Problem-ttic format version c Educide Software Licensed for use by drienne rouch Terms of Use at N & PS Practice Test 02/03/
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