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Flashcards in Intro to Biology Deck (42)
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31

Active Transport

Transports areas of low concentraion to high concentration against their concentration gradient

32

Messenger RNA

Carries information that determines which amino acids are used to make a protein

33

Endoplasmic reticulum

Eukaryotic organelle where protein synthesis occurs

34

Polygenetic inheritance

- a phenotype results fromt he interaction of many genes
- breeder breeds black dogs, but the dogs bear offspring of not only black but tan, brown and gray

35

DNA Replication steps (4)

1. Dna molecule unwinds
2. Dna molecule seperates into two template strands
3. Complementary nucleotides are added to each template strand
4. Two dna molecules each with a template strand and a new strand, are formed

36

Characteristic of DNA but not RNA

Intertwined with histone proteins

37

A suckerfish eating food left by a shark is an example of

Commensalism

38

Scientist studying 1000 species of bacteria in the stomach are studying what level of ecological organization?

Community

39

Ecological organization: Community

Scientist studying 1000 species of bacteria in the stomach are studying what level of ecological organization

Four species of woodpecker utilize the same resources for food and nesting

40

Cell Cycle (4)

Interphase
- G1 : cell produces more proteins, and organelles
- SPhase : dna replications; 23 chromosomes becomes 46; histones Organize and help unwind DNA so the replication enzymes can access it
- G2 : prepare for mitosis, making microtubuoles
Mitosis or Meiosis

41

Stages of Meiosis/ Mitosis (4)

- prophase
- metaphase ; Dna structure: The centromere at the center keeps DNA lined up at the cell's equator
- meta to ana; Sister chromatids are aligned along the center of the cell then pulled apart into seperate chromatids
- anaphase: Sister chromatids are being separated and moving towards opposite poles of the cell
- telophase

42

Stages of Meiosis (8)

- Prophase I : chromosomes match up in homologous pairs
- metaphase I :
- anophase I :
- telophase I : A cell is currently dividing, the two new daughter cells will be haploid, but the DNA they contain is still replicated. Chromosomes have seperated but have not yet begun the second round of division
- prophase II : Homologus pairs of chromosomes have seperated into two cells. Sister chromatids in each cell have not yet lined up in the middle of the cell
- metaphase II :
- Anophase II :
- telophase II :