Top-Rated Free Essay
Preview

Building blocks of life

Satisfactory Essays
458 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Building blocks of life
The Building Blocks of Life Worksheet

Part 1: Mitosis and Meiosis Short-Answer Response
Why are the process of mitosis and meiosis both important to a living organism?
The process of mitosis and meiosis are both important to a living organism because without them a cell would not be able to reproduce. Mitosis is an asexual process used to replace old and dead cells with new ones by dividing into two identical daughter cells. Meiosis, however, is the step that makes sexual reproduction possible by taking a cell (diploid) and splitting it into two daughter cells (haploid) containing only half of the homologous pair.
When would an organism need to undergo the process of mitosis? Meiosis?
Mitosis is the process a cell goes through in order to replace damaged or dead cells with new cells; these cells would be identical to each other as well as the parent cell. Therefore, an organism would need to undergo mitosis during its growth and development and when it needs to repair a wound or injury. Meiosis is the process a cell goes through in which it divides each cell by exactly one-half of the parent cell. An organism would undergo this process before reproducing in order to prepare for fertilization.
What would happen if meiosis did not occur?
If meiosis did not occur reproduction would not be possible. During this process a cell gets divided into one-half of the parent cell, which means that the cell contains one-half the DNA that an organism needs. Without this process the other half would not have anything to combine with to complete the DNA required to create a new cell. This would mean that reproduction of a new cell would not occur and the whole process would not be possible.

Part 2: Photosynthesis and Cellular Respiration Matrix

Complete the matrix. Use the following questions to aid in completion:

• What is the purpose of this pathway?
• Reactants: What does this reaction need to proceed?
• Products: What is produced because of the reaction?
• The role of ATP: Does it supply energy or store energy?

Cellular respiration Photosynthesis
Pathway Glycolysis Krebs cycle Electron transport Light-dependent reaction Light-independent reaction
Purpose Splits sugar Completes the process of breaking down glucose Transfers hydrogen Provide energy for the light-independent reaction Makes sugar
Where it takes place Cell cytoplasm Mitochondria Mitochondria Chloroplasts Chloroplasts
Reactants Six-carbon sugar, glucose Two three-carbon, hydrogen atoms NADH Chlorophyll, sunlight ATP, carbon dioxide, and NADPH
Products 2 three-carbon compounds Carbon dioxide and ATP ATP ATP, oxygen Carbohydrates
The role of ATP Supplies energy used for the next stage Supplies energy needed by the next stage Energy is captured to convert oxygen to water Transports solar energy in the form of ATP to power other chemical reactions Supplies energy needed to make carbohydrates

You May Also Find These Documents Helpful

  • Good Essays

    LabPaq mitios

    • 520 Words
    • 3 Pages

    Mitosis is easily observed in cells that are growing at a rapid pace such as whitefish blastula or onion root tips, which was used in this lab experiment. The root tips contain and area called the apical meristem that has the highest percentage of cells undergoing mitosis. The whitefish blastula is formed directly after the egg is fertilized. This is a period of rapid growth and numerous cellular divisions where mitosis can be observed. In mitosis the cell is in interphase, and have a distinct nucleus and nucleoli where the thin threads of chromatin thicken into distinct chromosomes and the nuclear evvelope breaks open releasing them into the cytoplasm. The firs signs of the spindle begin to appear, next the cell begins metaphase, where the spindle attaches to the Centromere of each chromosome and moves them to the same level in the middle of the cell. This level position is called the metaphase plate. Anaphase begins when the chromatids are separated and pulled to opposite poles, then the final stage is telophase. The nuclear envelope is reformed and the chromosomes gradually uncoil. Cytokinesis may occur, in which, a cleavage furrow will form and the two daughter cells will separate. Meiosis is more complex and involves two nuclear divisions. The…

    • 520 Words
    • 3 Pages
    Good Essays
  • Good Essays

    5) Mitosis and meiosis are alike in the respect that go through most of the same phases, and are used for reproduction purposes. However, meiosis results in sexual reproduction, in order to create multicellular organisms, occurring in only animals, humans, fungi, and plants, whereas mitosis occurs in all organisms. Mitosis only goes through one division, has the same number of chromosomes, and creates only two diploid cells. Meiosis undergoes two divisions, the creation of four haploid cells, and half reduces the chromosomes.…

    • 1278 Words
    • 6 Pages
    Good Essays
  • Powerful Essays

    BIO 310 Homework 3

    • 917 Words
    • 4 Pages

    Mitosis The production of two daughter cells that are identical to the parent cell. Parent cell=haploid, daughter cell=haploid. Parent cell=diploid, daughter cell=diploid.…

    • 917 Words
    • 4 Pages
    Powerful Essays
  • Satisfactory Essays

    My Essay

    • 298 Words
    • 2 Pages

    A: Mitosis is not for sex cells. Mitosis also uses RNA to replicate the DNA and divide. Meiosis is for sex cells (sperm and egg) and doesn't use RNA to replicate. They are similar in that they are the two main ways that cells divide to form more cells. Mitosis provides four cells and meiosis provides two cells.…

    • 298 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Chapter 3: Cells

    • 784 Words
    • 4 Pages

    Mitosis is a process in which cells replicate their DNA to create new cells that are genetically identical. The DNA is propagated throughout the new cells and the genetic information is “immortalized”.…

    • 784 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Sordaria Lab

    • 1940 Words
    • 8 Pages

    Meiosis is the process of cell division in which gametes are produced. It results in four haploid (IN) cells from two diploid (2N) cells (Cyr). In meiosis I, crossing over and independent assortment of the chromosomes occur. These two processes increase the genetic variation within the cell either benefiting or hurting the cell’s ability to adapt (natural selection). After these two events have occurred, the chromosomes will then proceed through all four stages and produce two daughter cells (Cyr). In meiosis II, the two daughter cells each again proceed…

    • 1940 Words
    • 8 Pages
    Good Essays
  • Satisfactory Essays

    Patho

    • 2725 Words
    • 11 Pages

    Response Feedback: Meiosis occurs only in replicating gametes or reproducing cells. In phase one, the number of chromosomes is reduced by half but the chromatid pairs remain together. In phase two, the chromatids split apart forming four daughter cells. Non-germ cells such as red blood cells or skin cells undergo mitosis.For more information on this topic, consult:Carol Mattson Porth and Glen Matfin, Pathophysiology, 8th Edition, page(s) 122-123, 123fCarol Mattson Porth, Essentials of Pathophysiology, 2nd Edition, page(s) 52-53, 53f Elizabeth J. Corwin, Handbook of Pathophysiology, 3rd Edition, page(s) 15-16Pathophysiology Made Incredibly Easy, 4th Edition, page(s) 436Anatomy and Physiology Made Incredibly Visual, page(s) 11Animation(s) Cell Cycle…

    • 2725 Words
    • 11 Pages
    Satisfactory Essays
  • Good Essays

    On the other hand, there are many contrasts such that there is only one cell division in mitosis as there is two cell divisions in meiosis. These phases are called meiosis one and meiosis two. Another contrast is that mitosis produces only two daughter cells whereas meiosis produces four haploid daughter cells. These daughter cells come out exactly the same in mitosis but not in meiosis because the chromosomes exchange DNA strips with one another and four daughter cells are produced to mix the DNA. Typically, mitosis is a form of reproduction in prokaryotic organisms because they only have one cell whereas meiosis is a form of reproduction in eukaryotic organisms because they have many cells. In other words, mitosis is a form of asexual reproduction where one cell splits and forms two new cells and meiosis is a form of sexual reproduction that requires the union of a sperm and egg for this process to occur.…

    • 425 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Biology quiz

    • 634 Words
    • 3 Pages

    1. Meiosis is similar to mitosis, except that it involves two divisions, meiosis I and meiosis II, and the resulting cells are haploid, rather than diploid like those produced by mitosis.…

    • 634 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Biology

    • 377 Words
    • 2 Pages

    DNA must replicate before mitosis or meiosis can occur. If daughter cells are to receive a full set of genetic information, a duplicate copy of DNA must be available. Before DNA replication occurs, each chromosome consists of a single long strand of DNA called a chromatid. When a diploid cell undergoes meiosis, four unique haploid daughter cells are produced. It is important for gametes to be haploid…

    • 377 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Meiosis is the process by which cells divide and create living creatures. Without meiosis we cannot have the process of mitosis, which is the process by which cells of tissue are created for living creatures. When meiosis occurs 4 daughter cells are created, while only 2 are created in mitosis. With the creation of 2 daughter cells the new cells will be similar to the parent cell, but will have differences, as there more parent cells involved. When mitosis occurs the daughter cells will be identical to the parent cell, since only 1 cell is involved. Meiosis is needed for sexual reproduction, while mitosis is needed for general growth, repair, and cellular reproduction of the body. The process of mitosis is not involved in any sex cell, and meiosis is not involved in any cell with the exception of sex cells. Since meiosis has more cells involved (parent cells) this process has a few more steps than what mitosis does. There are several similarities between the process of mitosis and meiosis. For example both processes occur at the cellular level. Both processes share genetic material from the parent cell to the daughter cell. In conclusion without meiosis we would not be created and therefore not need the process of meiosis, because cells would not be able to form.…

    • 644 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Biology Review Guide

    • 1110 Words
    • 5 Pages

    2. In 2-4 sentences compare and contrast mitosis and meiosis including the steps, purpose and products. Mitosis and meiosis are types of nuclear division that make different types of cells. Mitosis makes diploid cells that are genetically identical. It takes place throughout an organism’s lifetime and is involved in asexual reproduction. During meiosis, diploid cells undergo 2 cell divisions that result in 4 haploid cells. Meiosis occurs in sex cells, produces gametes, increases genetic diversity and produces genetically unique cells. It takes place only at certain times in an organism’s life cycle and is involved in sexual reproduction.…

    • 1110 Words
    • 5 Pages
    Good Essays
  • Satisfactory Essays

    Cell Growth and Division

    • 384 Words
    • 2 Pages

    Mitosis is the process by which the nucleus of the cell is divided into two nuclei, each with the same number and kinds of chromosomes as the parent cell.…

    • 384 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Cells Cell

    • 543 Words
    • 3 Pages

    In order of all cells to be the same as a parent the mitosis in a must. Mitosis is the separation of copied chromosomes into single cells. The problem with unregulated cell division is that most of the time this will lead to cancer. Only when DNA replication as well as mitosis is working the correct way then cell cycle cell points are insured.…

    • 543 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Buiding Blocks

    • 621 Words
    • 3 Pages

    Mitosis is needed to repair damaged cells or to start a new cycle through cellular division. The cells divide and will create new cells when a cell needs to be replaced on a regular basis within the living organism. If the living organism is aging mitosis can repair the older cells. There are hormones in the organism’s body that sends signals to the cells to prepare for division when it is needed. Interphase which is the growth, preparation, and cell division Pruitt and Underwood, 2006). Meiosis is needed to produce cells designed for sexual production. Without mitosis and meiosis simple organism could not reproduce and complex organism could not repair damaged cells, or contribute to DNA to offspring.…

    • 621 Words
    • 3 Pages
    Good Essays