WorksheetsDNA Practice
Total questions: 55
Worksheet time: 4hrs 7mins
Base that pairs with thymine.
guanine
cytosine
adenine
phosphate
The base that pairs with guanine.
cytosine
adenine
phosphate
thymine
A complex molecule containing the genetic information that makes up the chromosomes.
deoxyribose
deoxyribonucleic acid (DNA)
nucleotide
gene
Two strands of nucleotides wound about each other; the shape of DNA.
helix
spiral
double helix
ladder
When bases do not pair up correctly. It changes the genetic sequence.
genetic mutation
disease
genetic error
mutant
The base that pairs with cytosine.
guanine
thymine
phosphate
adenine
The chemicals that make up the rungs of the DNA ladder.
deoxyribose
phosphate
nitrogen bases
nucleotides
Nucleotides are made of a molecule of deoxyribose, connected to a phosphate & a nitrogen base. They make up one side of the DNA double helix.
true
false
The control center of the cell, containing DNA.
nucleus
ribosome
cell membrane
nucleotide
The base that pairs with adenine.
thymine
guanine
cytosine
phosphate
What are the four bases found in DNA?
U, A, T, B
B, O, A, T
A, G, C, T
U, V, W, X
Where do we find DNA?
in the nucleus of cells
in the ribosomes
in the endoplasmic reticulum
Which bases pair together?
A--> T, C--> G
A --> G, C --> T
A--> C, G --> T
A matches with T, C matches with G. Show the complementary strand for the following:
AGCTCATA
(a)
How many strands are in DNA?
one
two
What are the names of the two scientists that are credited with discovering the structure of DNA?
Einstein and Curie
Dalton and Darwin
Watson and Crick
What type of bonding holds the complementary bases together?
ionic bonding
covalent bonding
hydrogen bonding
What is a section of DNA that codes for a specific protein called?
RNA
replication
gene
protein
What is it called when DNA makes a copy of itself?
Translation
Replication
Mitosis
Gene therapy
When replication is complete, there are two _____________ DNA modules.
identical
different
similar
Look at the image of DNA, what type of bond connects the phosphate and the sugar in the backbone?
Covalent Bond
Hydrogen Bond
A always pairs with _____ and C always pairs with _____
T, G
G, T
C, A
A, C
ATG TGA CAG
AATCATGGA
A code is a set of rules and symbols used to carry ___________.
DNA
information
structure
function
Mutations are always bad
true
false
A species of frog lives in the rainforest. One of the frogs is born with a mutation which causes it's skin to be completely white. This is an example of a
positive mutation
negative mutation
neutral mutation
An environment becomes colder. Some of the rabbits which live there have a mutation that causes their fur to be longer and thicker allowing them to stay warmer. This is an example of a
positive mutation
negative mutation
neutral mutation
What mutation has occurred here?
T-G-A-C-C-A
T-G-A-G-C-A
Substitution
Deletion
Insertion
Frameshift
DNA molecule segment is : TTACGCAAG
The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.
Substitution
Deletion
Insertion
Inversion
A mutation is defined as:
A change in the cell's structure
Anything that changes in an embryo
Any change in the physical features of a human
A change in the DNA sequence
GAG-CTC-GAC-AGA
Mutant
GAG CTC-CAC-AGA
A mutation that has NO effect on an organism's ability to survive and reproduce
harmful mutation
helpful mutation
neutral mutation
Can DNA mutations(changes) be passed on to offspring?
yes
no
What are the two ways mutations can occur?
inherited
abduction
they don't exist
acquired
A mutation that helps an organism survive and reproduce
harmful mutation
helpful mutation
neutral mutation
A mutation that decreases an organism's ability to survive and reproduce
harmful mutation
helpful mutation
neutral mutation
A mutation that has NO effect on an organism's ability to survive and reproduce
harmful mutation
helpful mutation
neutral mutation
Which one is a chromosome?
A
B
C
D
Which one is DNA?
A
B
C
D
