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  5. 11.2 The Structure Of Dna(20pts.)

11.2 - The Structure of DNA(20pts.)

Authored by Spenser Chakerian

Science

9th - 12th Grade

HS-LS1-1 covered

Used 25+ times

11.2 - The Structure of DNA(20pts.)
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11 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

A nucleotide of DNA may contain adenine, guanine, cytosine, or thymine.

What is each of these components?

5-Carbon Sugar

Nitrogenous Base

Phosphate Group

Nucleic Acid

Answer explanation

Media Image

The nitrogenous base is the component of a nucleotide of DNA that can be adenine, guanine, cytosine, or thymine.

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2.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

The experiments and data are crucial for understanding DNA (a)  

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3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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What type of information does the data table contain?

The percentages of bases found in DNA of different Organisms.

The percentages of bases found in Proteins of different Organisms.

The types of Organisms that have DNA.

The percentage of sugar-phosphate in the backbone of DNA.

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4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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Chargaff's rules of base pairing are explained by which structural feature

of DNA?

Each strand of DNA contains a phosphate and sugar backbone.

The nucleotides of DNA may be arranged in a wide variety of sequences.

DNA is triple stranded, and covalent bonds between identical nucleotides

hold the two strands together.

DNA is double stranded, and hydrogen bonds between base pairs hold the

two strands together.

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5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which statement did Chargaff conclude based on these data?

(Note: A letter in brackets, such as [A] or [C], refers to the concentration of one of the

nitrogenous bases.)

in DNA molecules,

[T] > [A] > [G] > [C]

in DNA molecules,

[T] = [A] = [G] = [C]

in DNA molecules,

[T] = [A] and [G] = [C]

in DNA molecules,

[T] < [A] = [G] > [C]

Answer explanation

Equal numbers of A and T mean that those are equal.

[AND]

Equal numbers of C and G mean that those are equal.

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6.

DRAG AND DROP QUESTION

1 min • 3 pts

If a species has [35 percent adenine] in its DNA, what is the percentage of the other three bases?

[15% - ​ (a)   ]

​ [​ (b)   - Thymine]

[​ (c)   - Cytosine]

35%

Guanine

15%

Thymine

Uracil

Answer explanation

The species has 35% adenine in its DNA, so the remaining percentages must be distributed among the other three bases. Therefore, the percentages are 35% Guanine, 15% Thymine, and the remaining percentage for Cytosine.

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Learning Target 1

7.

CATEGORIZE QUESTION

3 mins • 4 pts

Media Image

Organize these options into the right categories

Groups:

(a) Adenine

,

(b) Thymine

,

(c) Guanine

,

(d) Cytosine

Hydrogen bonds with Adenine in DNA

Hydrogen bonds with Thymine in DNA.

Hydrogen bonds with Cytosine in DNA

Hydrogen bonds with Guanine in DNA

Answer explanation

A=T

C=G

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Learning Target 1

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