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3.1.9-12.A: Construct an explanation based on evidence for how the structure of DNA determines the structure of proteins which carry out the essential functions of life through systems of specialized cells.
Amoeba Sisters: Protein Synthesis
Explore the steps of transcription and translation in protein synthesis! This video explains several reasons why proteins are so important before explaining the roles of mRNA, rRNA, and tRNA in the steps of protein synthesis! Expand details for contents and resources.
Bozeman Science: Transcription and Translation
Paul Andersen explains the central dogma of biology. He explains how genes in the DNA are converted to mRNA through the process of transcription. He then explains how ribosomes use this message to convert the mRNA to a functioning protein. He also shows you how to decode a gene by converting the DNA to complementary mRNA and then to the specific amino acids in a protein.
Amoeba Sisters: Gene Expression and Regulation
Join the Amoeba Sisters as they discuss gene expression and regulation in prokaryotes and eukaryotes. This video defines gene expression and explains how gene expression relates to gene regulation before going into examples of gene regulation that can involve or impact transcription, translation, and post-translation. Operons, which are common in prokaryotes, are also mentioned. The video also emphasizes that eukaryotes have many opportunities for gene regulation while prokaryotes tend to have gene regulation focused on transcription.
Bozeman Science: Gene Regulation
Paul Andersen explains how genes are regulated in both prokaryotes and eukaryotes. He begins with a description of the lac and trp operon and how they are used by bacteria in both positive and negative response. He also explains the importance of transcription factors in eukaryotic gene expression.
3.1.9-12.B: Develop and use a model to illustrate the hierarchical organization of interacting systems that provide specific functions within multicellular organisms.
Amoeba Sisters: Introduction to Cells
Compares and contrasts prokaryote cells and eukaryote cells before exploring organelle structures and functions! Video includes the modern cell theory and plant vs. animal cell comparisons. See table of contents by expanding video details
Amoeba Sisters: Introduction to Cells
Join Pinky and Petunia of the Amoeba Sisters in a review game video! This video provides clues for the viewer to guess the cell organelle or structure before revealing it. As a bonus, towards the end of the video, you'll have the opportunity to label the organelles and structures discussed within both animal and plant cells.
Bozeman Science: A Tour of the Cell
Paul Andersen takes you on a tour of the cell. He starts by explaining the difference between prokaryotic and eukaryotic cells. He also explains why cells are small but not infinitely small. He also explains how the organelles work together in a similar fashion.
3.1.9-12.C: Plan and conduct an investigation to provide evidence that feedback mechanisms maintain homeostasis.
Amoeba Sisters: Homeostasis and Negative/Positive Feedback
Explore homeostasis with the Amoeba Sisters and learn how homeostasis relates to feedback in the human body. This video gives examples of negative feedback (temperature and blood glucose regulation) and positive feedback (events in childbirth).
Amoeba Sisters: Osmosis and Water Potential
Explore the process of osmosis in this updated Amoeba Sisters video! Video features real life examples of osmosis, important vocab, and introduces concept of water potential and turgor pressure in plant cells. Expand details for table of contents. We have an Unlectured resource on this topic!
Bozeman Science: Homeostatic Loops
Paul Andersen describes four important homeostatic loops in biology. He begins with a brief description of the elements of a homeostatic loop. He then describes how the hypothalamus helps us maintain a stable internal body temperature. He explains the role of the pancreas (insulin and glucagon) in regulating blood glucose. He explains how the thyroid and parathyroid glands (along with calcitonin and PTH) regulation blood calcium. He also explains how the pituitary gland (and ADH) help regulate the osmolarity of the blood.
Bozeman Science: Positive and Negative Feedback Loops
Paul Andersen explains how feedback loops allow living organisms to maintain homeostasis. He uses thermoregulation in mammals to explain how a negative feedback loop functions. He uses fruit ripening to explain how a positive feedback loop functions. He also explains what can happen when a feedback look is altered. Diabetes mellitus is caused by an alteration in the blood glucose feedback loop.
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