Q1: A) Draw and label diagrams of an animal cell as seen under a light microscope, showing the visible organelles.
Name Definition/Function
Plasma membrane Controls what goes in and out of the cell. It consists of lipid and protein. The protein embedded within the lipid bilayer carry out specific functions within the plasma membrane, such as cell to cell recognition and selective transport of molecules.
Nucleus Composed primarily of histone protein and deoxyribonucleic acid (DNA). With the exception of red blood cells, all cells have a nucleus in the human body. The nucleus stores the genetic material DNA which governs the characteristics of the cell and its metabolic functioning.
Nuclear envelope The nucleus of human cells is surrounded
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Within the cytoplasm are a number of microscopic bodies called organelles ("little organs"). Various cellular functions occur within these organelles. An example of an organelle is the endoplasmic reticulum
Ribosomes
Particles composed of protein and RNA. Function: Bodies where proteins are synthesized.
Mitochondria Membranous sacs with inner partitions. Function: Site where energy released from food molecules and transformed into usable form.
Lysosomes
Membranous sacs. Function: Contain enzymes for intracellular digestion.
Chromatin Fibers composed of protein and DNA molecules. Function: Contains genetic information for protein
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• S phase or the Synthesis phase - There is replication of genetic material in this phase. Chromosomes duplicate, each of the 46 chromosomes become a complex of two sister, identical chromatids.
The interphase stage is followed by meiosis I and meiosis II.
Meiosis I
• The pairs of homologous chromosomes, made up of two sister chromatids are split into two cells.
• The resulting daughter cells contains one entire haploid set of chromosomes.
• It produces two haploid