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Zoology Exam 1 > DNA > Flashcards

DNA Flashcards

1
Q

What does DNA stand for?

A

Deoxyribonucleic acid

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2
Q

What is the sub-unit of a DNA molecule?

A

Nucleotide

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3
Q

What are the three molecules that make up a nucleotide?

A

Phosphate group pentose sugar and nitrogenous base

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4
Q

What are the four different types of nucleotides found in DNA?

A

Adenine thymine cytosine guanine

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5
Q

Which nitrogenous base bonds to which?

A

A to T

C to G

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6
Q

What shape results from base pairing of DNA molecules?

A

A double helix

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7
Q

What are chromosomes?

A

Thread-like structure that carries genes

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8
Q

What are genes?

A

Sequence of nucleotides segment of DNA that codes for a particular protein product

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9
Q

What is the relationship between genes and chromosomes?

A

Genes are found on the chromosomes

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10
Q

When are chromosomes unreplicated

A

And haploid cells

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11
Q

When are chromosomes replicated

A

In diploid cells

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12
Q

What are sister chromatid

A

Replicated chromosome attached by the centromere

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13
Q

How do they compare genetically to each other sister chromatid

A

They are identical

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14
Q

What holds sister chromatids together

A

A centromere

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15
Q

Why is replication considered to be semi conservative

A

As a template add complementary nucleotides to it to form two double-stranded DNA molecules

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16
Q

What is ploidy

A

Number of complete sets of chromosomes

17
Q

What does it mean when a cell is described as being haploid

A

One complete set of chromosomes n

18
Q

What does it mean when a cell is described as diploid

A

Two complete sets of chromosomes 2N

19
Q

In what kind of organism do you find diploid cells

A

In sexually reproducing organisms

20
Q

From where do the two sets of chromosomes, a diploid cell

A

One from the mother and one from the father

Zoology Exam 1 (5 decks)

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