Name: _______________________________________ Date: _________________ Per: _____________ Cells: The Basic Unit of Life Directions: Define the key terms and then complete the following Section Reviews after reading through Sections 5.1 through 5.3. You will complete your answers on a separate sheet of paper and then staple this worksheet on top. Vocabulary Words: Cells Cell Wall Prokaryote Chromosome Cell Theory Nucleus Nuclear Envelope Cytoplasm Cell Membrane Eukaryote
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Part I: Biotechnology Bio – “life”; Techno – “tools”; ologoy – “the study of” The use of living systems and organisms to develop or make useful products Any technological application that uses biological systems‚ living organisms or derivatives thereof‚ to make or modify products or processes for specific use It is an interdisciplinary field merging basic sciences‚ applied science‚ and engineering Branches of Biotechnology a. Bioinformatics – an interdisciplinary field addresses biological problems
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B io Factsheet September 2000 Number 76 The Eukaryotic cell cycle and Mitosis This Factsheet covers the relevant AS syllabus content of the major examining boards. By studying this factsheet the candidate will gain a knowledge and understanding of: • the different phases of the eukaryotic cell cycle (a eukaryotic cell has membrane bound organelles) • the importances of mitosis • the process of mitosis The eukaryotic cell cycle Fig 2. Quantity of DNA in the cell during different
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Chapter 6 Explain what free energy is and how it can be used to predict the energetic outcome of chemical reactions.Free energy is defined as the energy available to do work in any system. The free energy is denoted by the symbol G. G = H – TS* H: the energy contained in a molecule’s chemical bonds‚ called enthalpy.* TS: the energy term related to the degree of disorder in the system. T is the absolute temperature (K)‚ and S is the entropy.We can use the change in free energy to predict whether
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over the cycle of meiosis‚ the sexual life cycle‚ and its stages. Meiosis has four stages which are‚ prophase I‚ metaphase I‚ anaphase I‚ and telophase I. In an adult before ovulation the oocyte goes back to meiosis forming a meiotic spindle of microtubules to segregate homologous chromosomes. When it reaches fertilization‚ the egg itself undergoes a second round of division segregating sister chromatids. Which is Prophase II‚ Metaphase II‚ Anaphase II‚ and Telophase II. In this article it discusses
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Sea urchins are members of the phylum Echinodermata‚ which also includes sea stars‚ sea cucumbers‚ brittle stars‚ and crinoids. Like other echinoderms‚ they have five-fold symmetry (called pentamerism) and move by means of hundreds of tiny‚ transparent‚ adhesive "tube feet". The symmetry is not obvious in the living animal‚ but is easily visible in the dried test. Echinodermate means "spiny skin" in Greek. Specifically‚ the term "sea urchin" refers to the "regular echinoids"‚ which are symmetrical
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responsible for cell movement‚ cytokinesis (the process where the cytoplasm of a cell is divided to form two daughter cells) and organisation of organelles. It is there for movement and stability‚ and is made of 3 parts – the microfilaments‚ the microtubules and the intermediate filaments. Nucleus: This is the control centre of the cell. The nucleus regulates cell activity – such as metabolism‚ growth and reproduction – by controlling the enzymes. It also contains most of the cell’s DNA (genetic
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that bind specific proteins centromere 3)prophase is the first stage of mitosis characterized by the ____ of the chromosomes condensation 4)the attachment of which molecules is critical for the proper separation of sister chromatids? microtubules 5)the accommodation of the very long dna fiber into a limited space of the nucleus is achieved by coiling around beads of histones into repeating subunits. These subunits of chromosomes are given the name nucleosomes 6) which of the
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bacteria and viruses. What organelle do you expect them to have a relatively large amount of? A) Lysosome B) Ribosome C) ER D) Golgi apparatus E) Mitochondria 2. 3. This type of cell junction seals cells together into watertight sheets. A) Microtubules B) Desmosomes C) Tight junctions D) Gap junctions 3. If DNA is composed of 20% thymine‚ what percentage of guanine will be present? A) 20% B) 30% C) 60% D)10% E) 25% 4. 3. Phosphorus has 15 protons. How many electrons are in its
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Julia Babin Ms. Bukola 11/6/2012 Bio Lab W 8 Cell Structure and Function Prokaryotic cells do not contain a nucleus. Eukaryotic cells do contain a nucleus. Organisms are eukaryotic except Bacteria and Achaea. Organelles are small membranous bodies‚ each with a specific structure and function. Prokaryotes do have cytoplasm‚ which is the material bounded by a plasma membrane and cell wall. This contains ribosomes‚ small granules that coordinate the synthesis of proteins
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