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science test Flashcards

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Biology 101 flashcards
1
Q

what are three parts of a nucleotide?

A

base, sugar, phosphate

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2
Q

In DNA, what base pairs with guanine?

A

cytosine

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3
Q

What is a gene?

A

a section of a DNA moleicule that codes for a protein

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4
Q

During transcription, the information in a DNA molecule is copied to produce———molecule.

A

mRNA

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5
Q

In RNA, what base bonds with adenine?

A

Uracil

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6
Q

A codon codes for a(n)

A

protein

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7
Q

What determines the order of amino acids in a protein?

A

anti codons

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8
Q

What is the function of tRNA?

A

transfer the amino acids to the ribosomes

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9
Q

The process where one DNA molecule forms two identical DNA molecules is

A

mitosis

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10
Q

How do mitosis and cytokinesis differ?

A

mitosis is a copy of a cell, but cytokinisis splits the cell

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11
Q

In which phase of mitosis do the sister chromatids separate into two different chromosomes?

A

cytokeniss is where sister chromatids separate

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12
Q

How do the sister chromatids reach opposite ends of the cell during mitosis?

A

spindle fibers are the pushy and pully part of the chromosome.

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13
Q

During which part of the cell cycle is cytoplasm divided between the new daughter cells?

A

cytokenisis is when daughter cell happens aka cell splits

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13
Q

What is the purpose of meiosis?

A

more gamets with one set of genes

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14
Q

(True or False) If there is a gene for eye color on one chromosome of a homologous pair, then the other chromosome of that pair also contains a gene for eye color.

A

true

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15
Q

How do cells and DNA demonstrate irreducible complexity?

A

if one DNA base is wrong it wont work.

15
Q

Suppose a cell had 20 chromosomes at the beginning of its cell cycle.
After mitosis and cytokinesis were completed, each newly formed cell would have
chromosomes.

A

20

16
Q

The body cells of a rabbit contain 44 chromosomes. How many chromosomes would a rabbit egg cell contain?

A

22

16
Q

cell is undergoing transcription of a certain gene. If the gene’s DNA base code is thymine-guanine-guanine-adenine-cytosine, what will be the correct order of bases on the resulting mRNA molecule?

A

adenine—cytosine—cytosine—uracil—guanine

17
Q

What would happen if a ribosome accidentally skipped just one base when decoding the mRNA’s codons?

A

nothing would work

18
Q

How do DNA and genes show evidence of a Designer?

A

the complexity of life shows evidence of a designer.

19
Q

How do asexual reproduction and sexual reproduction differ?

A

asexual is without gametes and sexual reproduction is with gametes

20
Q

describe the shape of DNA

A

double helix or twisting ladder

science (6 decks)

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