BIO1A03 midterm 3 questions and answers already graded A

BIO1A03 midterm 3 questions and answers already graded A Which of the following statements is false about binary fission? A) This process is how bacteria cells asexually reproduce B) Binary fission is initiated when the DNA of the chromosome is anchored by proteins to the intracellular plasma membrane C) The cell becomes twice its original size before a cell plate is established, splitting the cell into 2 daughter cells D) Binary fission is less regulated than cell division in eukaryotes C) Cell plates are not established; the midpoint is apparent when the bacteria cell becomes twice its original size due to constriction; the synthesis of a new cell membrane and cell wall occur concurrently, leading to the complete division into two daughter cells Which of the following statements about cell differentiation is false? A) The ability for stem cells to endlessly differentiate and specialize under the right conditions is hindered during adulthood B) Myoblasts (mature muscle cells) are unable to undergo cell division C) The default state of stem cells within the membrane of muscle tissue is dormant D) Our skin is notorious for shedding as a result of constant epithelial cell turnover B) This describes *myofibers*; myoblasts are the muscle precursor cells that give rise to mature muscle cells that make up muscle fibres What happens when cells enter the G0 phase? Name an example of a cell that is permanently in the G0 phase in the human body. The cell cycle is paused in between the M and S phase; cells are not actively dividing. Examples of permanent G0 residing cells include the cells that make up our lens, nerve cells & mature muscle cells (myofibers) The interphase is made up of (pick 3) A) G1 phase B) G0 phase C) S phase D) G2 phase E) M phase A), C) and D) (in order) Interphase must occur before mitosis can begin because... It prepares the cells' DNA by replicating it & increasing the cell's overall size (G1 prepares for DNA synthesis, S initiates DNA replication, G2 prepares for mitosis) Which of the following stages of mitosis comes first? A) Prometaphase B) Metaphase C) Anaphase D) Prophase E) Telophase D) Prophase is defined as the stage when chromosomes are condensed & centrosomes begin radiating their microtubules from opposite poles of the cell During this stage of mitosis, sister chromatids are split from one another and are pulled to opposite sides of the cell by spindle fibres. Which phase of mitosis is described? A) Prophase B) Metaphase C) Anaphase D) Telophase E) Prometaphase C) During this stage of mitosis, microtubules of the mitotic spindle attach to chromosomes. Which phase of mitosis is described? A) Prophase B) Metaphase C) Anaphase D) Telophase E) Prometaphase E) Why is interphase important pre-mitosis? Chro