Biology Flashcards
study
Levels of Biological Organization
biosphere > ecosystem > community > population
Biomolecules
- carbohydrates
- proteins
- lipids
- nucleic acid
building blocks of carbohydrates
monosaccharides
building blocks of proteins
amino acids
building blocks of lipids
fatty acids, glycerol
building blocks of nucleic acid
nucleotides
Modern Cell Theory
- The cell is the most basic unit of life.
- All organisms are made up of cells.
- All cells arise from other cells.
- All cells have similar biomolecules and biochemical reactions.
- All cells contain genetic material which is passed
on from one cell to another. - All chemical and physiological processes in the body happen in the cell.
type of cell that has:
- no true nucleus
- no membrane-bound organelles
- mostly unicellular
- archaea, bacteria
prokaryotic cell
type of cell that has:
- true nucleus
- membrane-bound organelles
- unicellular, multicellular
- animalia, protista, fungi, plantae
eukaryotic cell
cell structures/parts of a typical plant cell
- mitochondrion
- vacuole
- cell wall
- cell membrane
- golgi bodies
- nucleus
- ribosomes
- chloroplast
cell structures/parts of a typical prokaryotic cell
- DNA
- cell membrane
- capsule
- ribosomes
- cell wall
- flagellum
Organelles present only in prokaryotes
- nucleoid region
- capsule
- plasmid
- pilli
Organelles present in both prokaryotes and eukaryotes
- ribosomes
- cytoplasm
- cell membrane
- genetic material
cell communication and transport
cell membrane
storage of genetic information
genetic material
protein synthesis
ribosomes
command center
nucleus
transportation of proteins and
other cellular components
golgi apparatus
protein synthesis and lipid production
endoplasmic reticulum
ATP synthesis
mitochondria
Cellular digestion
lysosome
photosynthesis
chloroplast
storage of food and other cellular components
vacuole
structural support, protections, controls cell transportation
cell wall
production of spindle fibers during cell division
centrioles
unique organelle in animal cell
centriole
unique organelle in plant cell
- chloroplast
- plasmoderma
- cell wall
- equational division
- diploid > diploid
- 2 daughter cells
- produce somatic or body cells
- for growth and repair
mitosis
- reductional division
- diploid > haploid
- 4 daughter cells
- produces sex cells/gametes
- for reproduction
meiosis
Spermatogenesis order
spermatogonium > primary spermatocyte > secondary spermatocyte > spermatids > sperms
Oogenesis order
oogonium > primary oocyte > secondary oocyte > egg > polar bodies
general term for all chemical reactions of a cell
metabolism
building up of chemical reactions
anabolism
breaking down of chemical reactions
catabolism
formation of carbohydrate molecules from carbon dioxide using the chemical energy produced from light dependent reactions
light independent reactions
cellular transport; diffusion and osmosis
passive transport
cellular transport that uses ATP
active transport
the DNA double chain “unzips” and a new complementary strand is formed for each “unzipped” strand, creating two complete double chains
replication
RNA for protein synthesis is created from DNA; instead of adenine-thymine, the base pairing is adenine-uracil
transcription
the messenger RNA produced from transcription will be used as a template for the synthesis of amino acids; three bases code for one amino acid
translation
plants with no xylem and phloem; no roots, stems or leaves; reproduce through spores
non-vascular (bryophytes)
mostly ferns, only have roots, stems and fronds; reproduce by spores
pteridophytes
non-flowering; mostly conifers
gymnosperms
flowering plants
angiosperms
has:
- 1 cotyledon
- parallel veins
- petioles and sepals in 3’s
- fibrous roots
- scattered vascular system
monocot
has:
- 2 cotyledons
- netted veins
- petioles and sepals in 4’s or 5’s
- taproot
- vascular system in rings
dicot
slow and permanent reaction by plants
tropism
reaction to light
phototropism
reaction to gravity
geotropism
reaction to touch
thigmotropism
organisms on the seabed; starfish, crab, corals
benthos
organisms that swim; fish, squid, shrimp
nekton
organisms that float
plankton
“fitness”; possession of favorable characteristics
adaptation
theory by Lamarch that says that traits developed or acquired during an organism’s lifetime are passed on to its offspring
inheritance of acquired characteristics
- diverse groups of organisms evolve from a common ancestor (common descent)
- the main mechanism for evolution us natural selection
Darwin’s theory of evolution
survival of the fittest by Charles Darwin
theory of natural selection
carries food to stomach
esophagus
use to mechanically and chemically digest
stomach
use to mechanically and chemically digest
stomach
used for chemical digestion; absorption of digested food
small intestine
used for absorption of water
large intestine
3 muscle cells
- cardiac
- skeletal
- smooth
bind bone to bone
ligaments
bind muscle to bone
tendons
soft bone; makes up skeleton of sharks and very young vertebrates
cartilage
carries oxygenated blood away from the heart
artery
carries deoxygenated blood back to the heart
veins
central nervous system contains
brain and spinal cord
peripheral nervous system contain
nerves
part of the brain that is for conscious thinking; intelligence
cerebrum
part of the brain for emotions
hypothalamus
part of the brain for body balance
cerebellum
brain stem consists of
- midbrain
- pons
- medulla oblongata