Free Printable DNA Synthesis

Worksheets

DNA Synthesis

Total questions: 20

Worksheet time: 24mins

Name

Class

Date

DNA replication results in

2 completely new DNA molecules

2 DNA molecules that each contain a strand of the original

1 new DNA molecule and 1 old

1 new molecule of DNA

DNA strand has the following bases AAGCCA what are the bases on the complementary strand

GGCTTA

TTGGGA

CCAGGT

TTCGGT

The new DNA strand formed after DNA replication is an exact copy of its parent strand

True

False

Key players in DNA Replication are...

enzymes

sugars

fats

amino acids

What is the function (job) of an enzyme?

speed up reactions

insulators

main source of energy

code for traits

Semi = half

Conservative = to keep

What does "DNA is semi-conservative" mean?

DNA keeps half of the original strand and creates a new strand

DNA keeps both original strands

DNA does not keep any old strands at all and makes completely new strands

What makes up the SIDES of a DNA ladder?

nitrogen bases

sugars & phosphates

genes & chromosomes

RNA

What makes up the rungs (steps) of a DNA ladder?

sugars & phosphates

nitrogen bases

sugars

genes & chromosomes

Which of the following best describes a DNA molecule?

double helix

contains ribose

made of amino acids

contains Uracil

10.

What is the significance of the sequence (order) of the Nitrogen Bases in DNA?

The order of the Nitrogen Bases determines the number of chromosomes present in an organism.

The order of the Nitrogen Bases determines the traits that an organism will possess (have).

The order of the Nitrogen Bases determines the gender of an organism.

The order of the Nitrogen Bases determines whether an organism is abiotic biotic.

11.

What are the 4 nitrogen bases?

adenine, thymine, cytoplasm, and guanine

adenine, thymine cytosine, and guanine

adenine, thymine, cytosine, and gylcerol

adenine, thymine, cytosine, and glucose

12.

Guanine goes with __________

adnine

cytosine

guanine

thymine

13.

DNA contains the bases Adenine, Guanine, Cytosine and Thymine. Which base is replaced in RNA by another base?

Adenine is replaced by Uracil

Thymine is replaced by Uracil

Guanine is replaced by Uracil

Cytosine is replaced Uracil

14.

How are DNA and RNA similiar?

They have nucleotides.

They have the same sugar.

They have the same bases.

They are double strands.

15.

DNA contains _____________________sugar.

fructose

deoxyribose

galactose

ribose

16.

mRNA.....

makes a complimentary copy of a section of DNA to take to the ribosome

makes a complimentary copy of a section of DNA to take to the mitochondria

makes a complimentary copy of a section of DNA to aid in replication

makes a complimentary copy of a strand of DNA to take to the nucleus

17.

What would be the mRNA strand to compliment the DNA strand with the following sequence:
TAC GAA

AUG CUU

ATG CTT

GCA TCC

GCA UCC

18.

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

cytosine

guanine

thymine

uracil

19.

Why is DNA important?

it is very small and very complicated

it's in everything

it serves as the blueprint for traits of all living things

because we eat it every day for energy

20.

What "unzips" the DNA molecule during DNA replication?

A glucose molecule

An enzyme

A molecule of tRNA

a Gene

Reset

DNA Synthesis

Total questions: 20

Worksheet time: 24mins

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