Biology 30
Module 3
Assignment 10
Copyright: Ministry of Education, Saskatchewan
May be reproduced for educational purposes
Biology 30
39
Assignment 10
Biology 30
40
Assignment 10
Biology 30
41
Assignment 10
Biology 30
42
Assignment 10
Assignment 10
Values
(40)
A.
Multiple Choice: Select the best answer for each of the following and
place a check () beside it.
1.
Duplication of DNA takes place ***.
____
____
____
____
2.
3.
____
____
a.
b.
____
c.
____
d.
the nucleus can direct activities in all areas of the cell
the surface area to volume ratio is such that sufficient
materials can pass in or out of the cell
the nucleus can remain smaller and not take up as
much space inside the cell
less energy is needed for a cell to divide when it is
smaller
Mitosis is to body cells as meiosis is to ***.
a.
b.
c.
d.
gametes
chromosomes
zygotes
fallopian tubes
*** shows the correct chromosome number resulting from the
indicated process.
____
____
____
____
Biology 30
continually
mainly during interphase
whenever a cell is injured
mainly at prophase
Cells commonly divide after they have reached a certain size,
rather than growing larger. Probably the most significant benefit
to a cell in being smaller in size is that ***.
____
____
____
____
4.
a.
b.
c.
d.
a.
b.
c.
d.
meiosis : 2n  2n
meiosis : n  2n
mitosis : 2n  2n
fertilization : 2n  n
43
Assignment 10
5.
In multicellular organisms, such as ourselves, the process of
meiosis results in ***.
____
____
____
____
6.
8.
a.
b.
c.
a codon
a protein
RNA
A major advantage of sexual over asexual reproduction is that
sexual reproduction ***.
____
____
a.
b.
____
c.
____
d.
is faster
allows for reproduction even if one organism is living
alone in a certain area
can occur at any time of the year, whereas asexual is
more restricted
can introduce variations in the characteristics of a
species
Of the following anticodons, the one representing a molecule of
tRNA carrying proline is ***.
____
____
____
____
Biology 30
formation of gametes
production of zygotes
repair of body cells
growth
A section of a DNA strand that is made of three nucleotides is a
***.
____
____
____
7.
a.
b.
c.
d.
a.
b.
c.
d.
CCU
GGT
GGA
CCT
44
Assignment 10
9.
The most suitable term applied to a group of cells or a group of
organisms having identical genetic compositions is ***.
____
____
____
____
10.
a.
b.
c.
d.
prokaryotic
eukaryotic
plant
animal
a.
b.
c.
d.
transfer RNA
messenger RNA
DNA
amino acids
Chromosome pairs which have similar lengths, shapes and genes,
are ***.
____
____
____
____
Biology 30
1
3
27
64
Molecules which transmit information from parent to offspring so
that the characteristics between the two are similar, are ***.
____
____
____
____
13.
a.
b.
c.
d.
Formation of a cell plate during cytokinesis is a distinguishing
feature during reproduction of a(n) *** cell.
____
____
____
____
12.
hermaphrodite
sporophyte
clone
colony
The minimum number of nucleotides required to make up a codon
which identifies one amino acid is ***.
____
____
____
____
11.
a.
b.
c.
d.
a.
b.
c.
d.
diploid
haploid
homologous
daughter chromosomes
45
Assignment 10
14.
In sexually reproducing organisms, doubling of chromosome
numbers every generation is prevented in a species by ***.
____
____
____
____
15.
a.
b.
c.
d.
mitosis
meiosis
mitosis and meiosis
neither mitosis nor meiosis
The healing of a cut or a burn wound on your hand is a form of ***.
____
____
____
____
a.
b.
c.
d.
sexual reproduction
cell fusion
fragmentation
regeneration
* * * * * * * * * *
Use the following key for statements 16 to 20.
Use the key to identify the condition in the reproductive process
described by each of the following statements. Place the letter of the
appropriate description from the key in the blank beside each statement:
Key: a.
b.
c.
A change from diploid to monoploid
A change from monoploid to diploid
No change in chromosome number
____ 16.
Formation of gametes in more complex organisms.
____ 17.
Formation of zygotes.
____ 18.
Fertilization.
____ 19.
Vegetative reproduction.
____ 20.
From zygote to adult organism.
Biology 30
46
Assignment 10
B.
(15)
Biology 30
Short Answer: – answer the following questions in the spaces provided.
1.
a.
Distinguish between the following pairs of terms:
i.
Asexual reproduction – Sexual reproduction.
ii.
Codon – Anticodon.
iii.
Centriole – Centromere.
47
Assignment 10
b.
Complete the following table comparing mitosis and meiosis.
Mitosis
takes place in
Meiosis
bodycells
number of cells
produced per
parent cell at end of
process
two
number of
chromosomes in
parent cell
number of
chromosomes in
daughter cells
2n
same as parent
type of cell
produced
(give an example)
gametes
purpose
(4)
Biology 30
2. Define genetic continuity and explain its importance.
48
Assignment 10
(8)
(6)
3.
4.
a.
The process that results in four daughter cells being
produced is ____________________ .
b.
Names are given to specific stages of the process. Indicate
the name of the stage where:
i.
doubling of DNA occurs ____________________
ii.
the chromosome pairs split and move to opposite sides
of the cell
____________________
iii.
the chromosomes shorten and thicken, becoming more
visible
___________________
iv.
marks the end of the first division of the nuclear
material
____________________
DNA, RNA, amino acids and proteins are all parts of processes
determining the kinds of actions taking place within individual
cells. In addition, they play varying roles in having the same, or
similar, genetic traits passed on to new cells.
What is the endproduct (or what is formed at the end) of the
following actions?
Biology 30
i.
Replication.
____________________
ii.
Transcription.
____________________
iii.
Translation.
____________________
49
Assignment 10
(12)
Biology 30
5.
A DNA strand can undergo duplication.
a)
When the DNA is unravelling and complementary strands
are forming what is the characteristic or feature of DNA
allows it to be duplicated in the first place?
b)
The sequence of nucleotide base triplets along a portion of
the non-coding A1 strand of DNA is AGA TAG CTG TCT.
Give the complementary DNA coding sequence on strand A2
and indicate how this should compare to DNA strand B1.
c)
Using the same DNA sequence as was given in (b), give the
messenger RNA that is formed.
d)
Give the sequence for tRNA from the same DNA template.
50
Assignment 10
e)
(8)
6.
Identify the four amino acids that would be taking part in
protein synthesis. Use either table 10.1 or the Codon Wheel
from Lesson 10.
There are definite advantages for both asexual and sexual
reproduction. Give two advantages and an example of each of the two
methods.
Advantage
asexual
reproduction
Example
1.
2.
sexual
reproduction
1.
2.
(1)
7.
A protein molecule is very complex. The number of amino acids
making up a protein would ______________________________.
(1)
8.
The genetic information is ready to be decoded once the mRNA has
reached the ribosomes. The process in which this is done is called
______________________________.
Biology 30
51
Assignment 10
(1)
9.
DNA duplication occurs in the ______________________________ stage in
both mitosis and meiosis.
(4)
10.
Meiosis can be referred to as reduction division. Explain what this
means and pinpoint where each occurs.
_____
(100)
Biology 30
52
Assignment 10