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finance and accounting exam 1 > bio quiz 3 > Flashcards

bio quiz 3 Flashcards

biology quiz 3

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1
Q

prokaryotic

A

bacteria

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2
Q

flagella

A

plural

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3
Q

flagellum

A

singular

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4
Q

flagella

A

whip-like structure that allow motility. Attached to the cell wall through the plasma membrane

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5
Q

4 arrangements of flagella

A

monotrichous-one flagellum at one pole
amphithrichous- several flagella at each pole
lophitrichous- several flagella at one pole
peritrichous- flagella all over the cell

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6
Q

Pilli

A

long extensions off cell wall. Pilli are used for plasmid membrane exchange and cell-to-cell contact

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7
Q

Fimbraie

A

not present in eukaryotes and is used for attachment to surfaces

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8
Q

cell wall

A

provides structure and support for bacterial cells

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9
Q

plasma membrane

A

made of a bilayer of phospholipids. used for selective transport into the cell.

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10
Q

Cytoplasm

A

Supports organelles. thick liquid portion inside cell. Composed mainly of water, and proteins, carbohydrates, lipids, ions, small molecules.

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11
Q

nucleoid region

A

not present in eukaryotes (contains genetic material (DNA) of the cell. Not surrounded by a membrane

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12
Q

the plasma membrane can mutate and stop the membranes from entering the cells

A

true

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13
Q

plasmids

A

small circular pieces of dna that are found in cytoplasm. Contain several genes not neccessary for survival, but may contain antibiotic resistance genes, Replicates separately from the DNA.

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14
Q

Ribosomes

A

functions in protein synthesis. Composed of 2 subunits made of ribosomal proteins and rna. Targets antibiotics.

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15
Q

Endospores

A

survival mechanism for bacillus and clostridium/ cell shrinkage and are not present in eukaryotes

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16
Q

dna coils to chromatin. chromatin coils to chromosomes

A

true

17
Q

histones are found in histones

A

true

18
Q

lysosomes are not in plan cells

A

true

19
Q

Dna is wrapped around proteins and then forms long fibers called chromatin

A

true

20
Q

the egg is the biggest cell in the body

A

true

21
Q

Each human contains 46 chromosomes (23) pairs in its nucleus with the exception of sperm and eggs, which only have 23 chromosomes

A

true

22
Q

the nucleolus produces ribosomal RNA

A

true

23
Q

what membrane is the nucleus surrounded by

A

the nuclear membrane

24
Q

the nuclear membrane

A

is a double membrane (has 2 layers) and has pores for exit of ribsome components and RNA.

25
Q

Endomembrane system RER

A

the RER is the membrane that is an extension of the nuclear envelope. functions: to make more membrane, and to make secretory proteins that will be excreted out of the cell. ex: antibodies

finance and accounting exam 1 (2 decks)

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