Question 1
Which question is a scientist who studies the genetic engineering of crops most likely attempting to answer?
Genetic_6349da534390b.jpg
a
How can natural selection create better crops?
b
How can the genetic variation of crops be increased?
c
How can crops be grown without a need for light?
d
How can a more stable and nutritious supply of crops be created?
Question 2
The table below shows the percentages of bases in a DNA sample. How much Adenine (A) should you expect to find in the sample?
a
17%
b
33%
c
50%
d
72%
Question 3
In a molecule of double-stranded DNA, the amount of Cytosine present is always equal to the amount of ______.
a
Cytosine
b
Guanine
c
Uracil
d
Thymine
Question 4
Genetic mutations are always bad.
a
True
b
False
Question 5
Match the UNIT 6 Key Terms to their correct definition.
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Column A
1.
adenine:
adenine
2.
base pairing:
base pairing
3.
cytosine:
cytosine
4.
guanine:
guanine
5.
thymine:
thymine
6.
Inversion mutation:
Inversion mutation
7.
mutagen:
mutagen
8.
mutation:
mutation
9.
point mutation:
point mutation
10.
chromosomal mutation:
chromosomal mutation
Column B
a.one of four nitrogenous bases found in DNA and RNA; pairs with guanine
b.
a change in number of chromosomes or a large amount of DNA in an organism
c.Principle that bonds in DNA and between RNA molecules can form only between complimentary bases
d.one of four nitrogenous bases found in DNA and RNA; pairs with cytosine
e.a change in the DNA
f.nitrogenous base found in DNA but not in RNA
g.chromosomal mutation that flips a segment of the chromosome
h.one of four nitrogenous bases found in DNA and RNA; pairs with thymine or uracil
i.chemical or physical agents in the environment that interact with DNA and may cause a mutation
j.gene mutation in which a single base pair in DNA has been changed
Question 6
Read the passage about mutation in DNA.
MUTATION
Mutation is a process that changes the DNA sequence when a cell is copying its DNA before division. The most common mutation occurs in the bases where a single base can be substituted for another, a base can be deleted, or an extra base is added. The cell is usually able to repair most of the changes.
What happens when change in the DNA is not repaired in a cell that will become an egg or a sperm?
a
the mutation is passed down to the offspring
b
the egg and sperm cells can not produce offspring
c
the mutation remains within the organism, and is not passed down
d
the egg and sperm cells repair the cell during the fertilization process
Question 7
This question REPLACES the Unit 6 Lesson 9 discussion.
This is worth 4 points of your total weekly recap quiz.
Please do your best, you have unlimited chances for DNA mastery!
7 Magnificently Awesome Science Meme's! | Biology humor, Fun science, Science memes
DNA carries the cell’s genetic information; however, it cannot leave the .
Because of this, it copies part of its nucleotide sequence into a complementary copy of
during the process called .
During this process, the enzyme,
separates the DNA strands.
One strand of DNA acts as the
from which nucleotides are assembled into a strand of RNA.
Each three letter sequence on the mRNA is called a .
The start codon is and the three stop codons are .
Once the mRNA leaves the nucleus, it goes to the to prepare for protein
synthesis, which is called .
During this process, a molecule brings the to the ribosome.
The amino acids are hooked together by bonds.
The tRNA is able to match up to the mRNA by the in its anticodons.
When the codon is reached, the chain is released into the .
Word Bank:
helicasestartABCUAG UGA UAArRNAcodonAUGtranscriptioncomplimentary basesDEF QRS,XYZtransponderlysosomeribosomeenzymetranslationnucleuslipidsstoptemplatepeptidecarbohydratetRNAcytoplasmproteinmutationmRNAamino acid
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