Homework Answers
ANS. 16. Once formed, mRNA carries genetic information from DNA to the “ribosomes”.
Ribosomes are the site of protein synthesis i.e. translation. In the case of eukaryotes, ribosomes are in the cytoplasm of the cell while in prokaryotes they are attached to the mRNA.
So, the correct option is d) ribosomes.
ANS. 17. DNA is a chain of “nucleotides”.
DNA stands for deoxyribonucleic acid. Since it is a nucleic acid so option © is incorrect.
DNA is a long polymer in which the monomer units are nucleotides. A nucleotide is made of 3 subparts – a nitrogenous base, a 5-carbon sugar, and a phosphate group.
ANS. 18. Synapsis and crossing-over occur in meiosis during “prophase I”.
Prophase I is divided into 5 sub-phases and at its second phase named “zygotene”, synapsis occurs due to the pairing of chromosomes. After this phase, in the pachytene stage of prophase I crossing-over between the non-sister chromatids of the homologous chromosomes occur.
So, the correct option is a) Prophase I.
ANS. 19. Cell cycle checkpoints are critical for “preventing cancer development”.
If the cell cycle checkpoints wouldn’t be there then there would be high chances of increased cell division which can lead to cancer development.
So, the correct option is d) preventing cancer development.
ANS. 16. Once formed, mRNA carries genetic information from DNA to the “ribosomes”.
Ribosomes are the site of protein synthesis i.e. translation. In the case of eukaryotes, ribosomes are in the cytoplasm of the cell while in prokaryotes they are attached to the mRNA.
So, the correct option is d) ribosomes.
ANS. 17. DNA is a chain of “nucleotides”.
DNA stands for deoxyribonucleic acid. Since it is a nucleic acid so option © is incorrect.
DNA is a long polymer in which the monomer units are nucleotides. A nucleotide is made of 3 subparts – a nitrogenous base, a 5-carbon sugar, and a phosphate group.
ANS. 18. Synapsis and crossing-over occur in meiosis during “prophase I”.
Prophase I is divided into 5 sub-phases and at its second phase named “zygotene”, synapsis occurs due to the pairing of chromosomes. After this phase, in the pachytene stage of prophase I crossing-over between the non-sister chromatids of the homologous chromosomes occur.
So, the correct option is a) Prophase I.
ANS. 19. Cell cycle checkpoints are critical for “preventing cancer development”.
If the cell cycle checkpoints wouldn’t be there then there would be high chances of increased cell division which can lead to cancer development.
So, the correct option is d) preventing cancer development.
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16. Once formed, mRNA carries genetic information from DNA to the a) smooth endoplasmic reticulum b)...
64. Which organelle has its own genetic information? a. endoplasmic reticulum b. ribosome c. mitochondrion d....
64. Which organelle has its own genetic information? a. endoplasmic reticulum b. ribosome c. mitochondrion d. golgi apparatus e. lysosome 65. Which organelle is a series of interconnected membranous canals or channels that run throughout the cytoplasm of the cell? a. golgi apparatus b. peroxisome c. mitochondrion d. endoplasmic reticulum 66. Which organelle is a composed of a double membrane structure with the inner membrane folded to form cristae? a. Lysosome b. endoplasmic reticulum c. mitochondrion d. ribosome 67. How...
1. Transcription occurs in the a. Nucleus. b. Ribosomes of the Rough Endoplasmic Reticulum. c. Mitochondrion....
1. Transcription occurs in the a. Nucleus. b. Ribosomes of the Rough Endoplasmic Reticulum. c. Mitochondrion. d. Cell membrane. e. Smooth Endoplasmic Reticulum. 2. The monomers of DNA and RNA are a. amino acids. b. monosaccharides. c. nucleotides. d. fatty acids. e. nucleic acids. 3. Which of the following statements regarding DNA is false? a. DNA uses the nitrogenous base uracil. b. DNA is a nucleic acid. c. One DNA molecule can include four different nucleotides in its structure. d....
2) The amount of DNA per cell of a particular species is measured in cells found...
2) The amount of DNA per cell of a particular species is measured in cells found at various stages of meiosis and the following amounts are obtained: 3.7 pg, 7.3 pg, 14.6 pg Match the amounts of DNA above with the corresponding stages of the cell cycle. You may use more than one stage for each amount of DNA. A. G1 B. Prophase I C. G2 D. Following telophase II and cytokinesis E. Anaphase I F. Metaphase II
13. Prokaryote such as bacterial undergo division by which of these division A. Binary fission B....
13. Prokaryote such as bacterial undergo division by which of these division A. Binary fission B. Meiosis C. Mitosis D. A and C E. B and C 14. Both eukaryotes and prokaryrotes have nuclei. True ( A) or False (B) 15. During mitosis, four identical cells are produced, while in meiosis, two unidentical cells are produced. True (A) or False (B) 16. In which of the phases of meiosis does crossing over or synapsis occurs? A. Prophase I B Metaphase...
Chapter 4: A Tour of the Cell 5. Smooth endoplasmic reticulum (SER) lacks _, which gives...
Chapter 4: A Tour of the Cell 5. Smooth endoplasmic reticulum (SER) lacks _, which gives it a "smooth" appearance. 6. True or false: If false, make it a correct statement. The smooth endoplasmic reticulum con- tains many enzymes that allow it perform functions like detoxify circulating drugs. 7. Use Figures 4.14 (page 65 of your textbook) and 4.17 (page 67 of your textbook) to answer the following question. Place the following steps in the order in which they occur...
Shaw University 8. Which of the following statements is correct? a. Crossing over occurs in prophase...
Shaw University 8. Which of the following statements is correct? a. Crossing over occurs in prophase I of meiosis and metaphase of mitosis. b. DNA replication occurs once prior to mitosis and twice prior to meiosis c. Both mitosis and meiosis result in daughter cells identical to the parent cells. d. Karyokinesis occurs once in mitosis and twice in meiosis. e. Synapsis occurs in prophase of mitosis. 9. The cell cycle in a certain cell type has a duration of...
Quession 14 Which statement about mitosis is true? Select one a. DNA replication is completed in...
Quession 14 Which statement about mitosis is true? Select one a. DNA replication is completed in prophase. b. The chromosome number in the resulting cells is halved c. Two genetically identical daughter cells are formed. d Crossing over occurs during prophase e. It consists of two nuclear divisions. Quession 15 How does a nucleus in G2 difler from a nucleus in G17 Select one a. DNA synthesis occurs only in G1 phase. b Inactive cells are arrested only in G2...
Experiment 3: Following Chromosomal DNA Movement through Meiosis In this experiment, you will follow the movement...
Experiment 3: Following Chromosomal DNA Movement through Meiosis In this experiment, you will follow the movement of the chromosomes through meiosis I and II to create gam- etes. Materials Procedure Trial 1 As prophase I begins, the replicated chromosomes coil and condense... 1. Build a pair of replicated, homologous chromosomes. 10 beads should be used to create each individual sister chromatid (20 beads per chromosome pair). The five-holed bead represents the centromere. To do this... For example, suppose you start...
9-6 M. A. Merritt, 2016 1511 Lab Exercise #9 PROCEDURE 2: Simulation of the stages of...
9-6 M. A. Merritt, 2016 1511 Lab Exercise #9 PROCEDURE 2: Simulation of the stages of Meiosis 1) To simulate synapsis, take the two homologous pairs of lona chromosomos and place one on top of the other. Do the same with the #2, medium length chromosomes and then the # 3 , short chromosomes., Fill in the sketch for PROPHASE 1 below, illustrating synapsis. Even though crossing over occurs in nature, DO NOT add CROSSING OVER to your sketch. After...
underers meiosis, how many cells will result, 12) If a eukaryotic cell has 20 chromosomes and...
underers meiosis, how many cells will result, 12) If a eukaryotic cell has 20 chromosomes and and how many chromosomes will they contain? A) 4 cells, each with 20 chromosomes B) 4 cells, each with 10 chromosomes C) 2 cells, each with 10 chromosomes D) 2 cells, each with 20 chromosomes Answer: 13) Crossing over occurs during which stage of meiosis? A) telophase I B) metaphase II C) anaphase II D) prophase II E) prophase I Answer: 14) Which of...
64. Which organelle has its own genetic information? a. endoplasmic reticulum b. ribosome c. mitochondrion d. golgi apparatus e. lysosome 65. Which organelle is a series of interconnected membranous canals or channels that run throughout the cytoplasm of the cell? a. golgi apparatus b. peroxisome c. mitochondrion d. endoplasmic reticulum 66. Which organelle is a composed of a double membrane structure with the inner membrane folded to form cristae? a. Lysosome b. endoplasmic reticulum c. mitochondrion d. ribosome 67. How...
13. Prokaryote such as bacterial undergo division by which of these division A. Binary fission B. Meiosis C. Mitosis D. A and C E. B and C 14. Both eukaryotes and prokaryrotes have nuclei. True ( A) or False (B) 15. During mitosis, four identical cells are produced, while in meiosis, two unidentical cells are produced. True (A) or False (B) 16. In which of the phases of meiosis does crossing over or synapsis occurs? A. Prophase I B Metaphase...
Chapter 4: A Tour of the Cell 5. Smooth endoplasmic reticulum (SER) lacks _, which gives it a "smooth" appearance. 6. True or false: If false, make it a correct statement. The smooth endoplasmic reticulum con- tains many enzymes that allow it perform functions like detoxify circulating drugs. 7. Use Figures 4.14 (page 65 of your textbook) and 4.17 (page 67 of your textbook) to answer the following question. Place the following steps in the order in which they occur...
Shaw University 8. Which of the following statements is correct? a. Crossing over occurs in prophase I of meiosis and metaphase of mitosis. b. DNA replication occurs once prior to mitosis and twice prior to meiosis c. Both mitosis and meiosis result in daughter cells identical to the parent cells. d. Karyokinesis occurs once in mitosis and twice in meiosis. e. Synapsis occurs in prophase of mitosis. 9. The cell cycle in a certain cell type has a duration of...
Quession 14 Which statement about mitosis is true? Select one a. DNA replication is completed in prophase. b. The chromosome number in the resulting cells is halved c. Two genetically identical daughter cells are formed. d Crossing over occurs during prophase e. It consists of two nuclear divisions. Quession 15 How does a nucleus in G2 difler from a nucleus in G17 Select one a. DNA synthesis occurs only in G1 phase. b Inactive cells are arrested only in G2...
9-6 M. A. Merritt, 2016 1511 Lab Exercise #9 PROCEDURE 2: Simulation of the stages of Meiosis 1) To simulate synapsis, take the two homologous pairs of lona chromosomos and place one on top of the other. Do the same with the #2, medium length chromosomes and then the # 3 , short chromosomes., Fill in the sketch for PROPHASE 1 below, illustrating synapsis. Even though crossing over occurs in nature, DO NOT add CROSSING OVER to your sketch. After...
underers meiosis, how many cells will result, 12) If a eukaryotic cell has 20 chromosomes and and how many chromosomes will they contain? A) 4 cells, each with 20 chromosomes B) 4 cells, each with 10 chromosomes C) 2 cells, each with 10 chromosomes D) 2 cells, each with 20 chromosomes Answer: 13) Crossing over occurs during which stage of meiosis? A) telophase I B) metaphase II C) anaphase II D) prophase II E) prophase I Answer: 14) Which of...
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