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Biology: explore STEM content (page 18 of 50) · openstem

All fields Software Mathematics Physics Chemistry Biology Engineering Astronomy Environmental Other Biology Biology groups

Explore STEM Content

Search the community's STEM library — free to study, yours to make your own.

Biology

Cells, genetics, ecology and physiology on openstem — flashcards, notes, quizzes, sketches and flowcharts shared by the community. Study free, or clone anything into your library.

Content Groups1

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Flowchart11 objects

Biology

DNA Repair Mechanisms · flowchart

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DNA Repair Mechanisms · flowchart

Flowchart20 objects

Biology

Biology · L4 · Photosynthesis: light reactions and the Calvin cycle · flowchart

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Biology · L4 · Photosynthesis: light reactions and the Calvin cycle · flowchart

Flowchart13 objects

Biology

Biology · L2 · How Vaccines Are Made: Weakened, Inactivated, and mRNA · flowchart

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Biology · L2 · How Vaccines Are Made: Weakened, Inactivated, and mRNA · flowchart

Flashcards10 cards

What is an organism?1 / 10

An organism is any single living thing — one oak tree, one rabbit, one bacterium. It is the smallest unit we talk about when describing ecosystems.

Biology

Biology · L2 · Ecosystem Vocabulary: Smallest to Biggest

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Biology · L2 · Ecosystem Vocabulary: Smallest to Biggest

Flowchart11 objects

Biology

Biology · L3 · The Allergic Response Pathway

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Biology · L3 · The Allergic Response Pathway

Flashcards10 cards

Name two examples of coccus (round) shaped bacteria.1 / 10

Streptococcus, which can cause strep throat and often grows in chains, and Staphylococcus, which lives on skin and often grows in grape-like clusters.

Biology

Biology · L2 · Example Bacteria for Each Shape

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Biology · L2 · Example Bacteria for Each Shape

Flashcards10 cards

What does DNA stand for, and what is its primary role in cells?1 / 10

Deoxyribonucleic acid — it stores the genetic instructions used in the development, functioning, and reproduction of living organisms.

Biology

Biology · L3 · DNA Structure

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Biology · L3 · DNA Structure

Flashcards10 cards

Which animal roars?1 / 10

A lion roars. Its loud roar can be heard far across the grassland.

Biology

Biology · L1 · Match the Sound to the Animal

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Biology · L1 · Match the Sound to the Animal

Flowchart7 objects

Biology

Biology · L1 · How Pollen Travels · flowchart

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Biology · L1 · How Pollen Travels · flowchart

Quiz5 questions

Where in the cell does glycolysis take place?

AThe cytoplasmBThe mitochondrial matrixCThe inner mitochondrial membraneDThe nucleus

Biology

Biology · L3 · Cellular Respiration in Detail Quiz

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Biology · L3 · Cellular Respiration in Detail Quiz

MoleculeO

Biology

Biology · L2 · Water (H₂O)

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Biology · L2 · Water (H₂O)

Flowchart13 objects

Biology

Virology Basics · flowchart

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Virology Basics · flowchart

Collection4 items

01Biology · L2 · Bacteria: Helpful and Harmful

02Biology · L2 · Viruses and Fungi

03Biology · L2 · Bacteria, Viruses, and Fungi Quiz

+1 more

Biology

Biology · L2 · Tiny Living Things: Bacteria, Viruses, and Fungi

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Biology · L2 · Tiny Living Things: Bacteria, Viruses, and Fungi

Collection5 items

01Biology · L3 · Mechanisms of Evolution

02Biology · L3 · Evidence for Evolution and Speciation

03Biology · L3 · Evolution and Natural Selection Quiz

+2 more

Biology

Biology · L3 · Evolution and Natural Selection

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Biology · L3 · Evolution and Natural Selection

Collection5 items

01Biology · L5 · Biophysics and Single-Molecule Methods

02Biology · L5 · Biophysics and Single-Molecule Methods

03Biology · L5 · STORM/PALM Super-Resolution Imaging Cycle

+2 more

Biology

Biology · L5 · Biophysics and Single-Molecule Methods

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Biology · L5 · Biophysics and Single-Molecule Methods

Quiz5 questions

Which algorithm should be used to find the single best-aligning conserved domain shared between two proteins that are otherwise unrelated across most of their length?

ANeedleman-Wunsch global alignmentBSmith-Waterman local alignmentCNeighbor-joiningDMaximum parsimony

Biology

Biology · L5 · Bioinformatic Sequence Analysis

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Biology · L5 · Bioinformatic Sequence Analysis

Quiz5 questions

How many kingdoms do scientists sort living things into?

AThreeBFourCFiveDSeven

Biology

Biology · L2 · Classifying Living Things Quiz

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Biology · L2 · Classifying Living Things Quiz

Collection5 items

01Biology · L1 · Whales and Dolphins Have Lungs

02Biology · L1 · Diving and Holding Their Breath

03Biology · L1 · Why Whales Must Surface to Breathe Quiz

+2 more

Biology

Biology · L1 · Why Whales Must Surface to Breathe

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Biology · L1 · Why Whales Must Surface to Breathe

Flashcards9 cards

Describe the electron transport pathway through Complexes I, III, and IV, and identify which complexes translocate protons across the inner mitochondrial membrane.1 / 9

Complex I (NADH:ubiquinone oxidoreductase) oxidizes NADH, passing electrons through a flavin mononucleotide cofactor and a chain of iron-sulfur clusters to reduce ubiquinone to ubiquinol, translocating 4 protons per pair of electrons. Complex III (cytochrome bc1) oxidizes ubiquinol and, via the Q cycle, passes electrons to cytochrome c while translocating 4 protons per electron pair. Complex IV (cytochrome c oxidase) oxidizes cytochrome c and reduces molecular oxygen to water at a binuclear heme a3-CuB center, translocating 2 protons per electron pair (plus consuming 2 additional matrix protons in water formation, contributing further to the charge gradient).

Biology