WorksheetsUnit 4 Genetics
Total questions: 25
Worksheet time: 13mins
RNA from two DIFFERENT organisms will both contain what?
sugar ribose and the base thymine (T)
sugar deoxyribose and base uracil (U)
sugar deoxyribose and the base thymine (T)
sugar ribose and base uracil (U)
Which of the following could a DNA molecule contain in its structure?
deoxyribose, cytosine and a lipid
deoxyribose, thymine, and a phosphate group
ribose, uracil, and a polypeptide
ribose, adenine, and thymine
(a) in a DNA molecule are held together by weak hydrogen bonds.
The letters A, T, C, G represent what in nucleotides?
phosphate groups
nitrogen bases
deoxyribose sugars
ribose sugars
The cellular process of creating two new DNA molecules from one original copy is called replication. Which statement is the BEST description of this process?
DNA opens up and RNA copies it.
RNA opens up the DNA and uses each strand as a template for a new strand.
DNA opens up and completely unwinds to make two new molecules
DNA opens up and each strand is used as a template for making a new strand.
The molecule copied directly from DNA is represented by number ______.
1
2
3
4
What is an example of a molecule produced by the process shown above?
glucose
polypeptide
glycogen
fatty acid
Structure number 2 represents a _____.
rRNA
ribosome
mRNA
tRNA
The bond represented by number 5 is a ____ bond.
ionic
hydrogen
covalent
peptide
If a portion of a messenger RNA molecule contains the base sequence A-A-U, then the corresponding anti-codon on
the tRNA base sequence is .
G-G-T
A-A-U
U-U-A
T-T-A
The sequence of ________________ in a DNA molecule determines the protein that will be produced.
proteins
lipids
sugars
nucleotides
During _____________, the cell uses information from messenger RNA to make polypeptides.
transcription
translation
meiosis
replication
How many amino acids are coded for by the strand of mRNA shown here? Assume the reading frame begins with the
first nucleotide. A-U-G-U-A-C
1
2
3
4
During protein synthesis, what does mRNA do?
It strings together two complementary RNA strands.
It delivers amino acids to assemble the polypeptide.
It delivers DNA’s instructions for making proteins to the ribosome.
It constructs proteins out of amino acids.
A sperm cell of an octopus has 14 chromosomes. What is the total number of chromosomes that should be present in
a stomach cell of the same octopus?
14
48
28
10
The distribution of chromosomes in one type of cell division is
shown in the diagram. Which process is being
represented in the diagram?
mitosis
asexual reproduction
meiosis
DNA Replication
Which letter(s) in the diagram pictured to the right correspond
to cells that are haploid?
A
B
A and B
B and C
Compared to the number of chromosomes contained in a body cell, how many chromosomes would normally be
contained in a gamete?
the same number
a quarter of the amount
half the amount
twice as many
In which phase of meiosis would certain gene segments of the homologous pairs of chromosomes "crossover" and
exchange genetic information?
Prophase I
Metaphase I
Anaphase I
Telophase I
Which cells are NOT formed during meiosis?
Somatic Cells
Sperm Cells
Sex Cells
Gametes
Two similar chromosomes that you inherit from your parents (one from your mother and one from your father) are
called
sister chromatids
homologous chromosomes
sex chromosomes
homozygous alleles
Which event takes place during anaphase II of meiosis?
spindle fibers break down
cytoplasm divides
sister chromatids separate
homologous chromosomes separate
Somatic (body) cells in humans contain ___ chromosomes, and an example is ___.
23; heart cells
46; sperm cells
30; skin cells
46; liver cells
Chromosomes line up in the middle of the cell single file during which phase?
Telophase I
Telophase II
Metaphase I
Metaphase II
DNA replication takes place in the _________ in humans.
cytoplas
ribosome
vacuole
nucleus
