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WorksheetsMutlple choice questions Biomate
Total questions: 40
Worksheet time: 20mins
Why are human sex hormones considered to be lipids?
They are essential components of cell membranes.
They are steroids, which are not soluble in water.
They are made of fatty acids
They are hydrophilic compounds.
Which of the following reactions requires the removal of water to form a covalent bond?
Glycogen form glucose subunits
Dipeptide form alanine + glycine
Cellulose form glucose
Glucose + galactose form lactose
Which of the following is the most significant difference between prokaryotic and eukaryotic cells?
Prokaryotic cells have a cell membrane; eukaryotic cells do not.
Prokaryotic cells possess ribosomes; eukaryotic cells do not.
Eukaryotic cells have DNA; prokaryotic cell do not.
Eukaryotic cells have membrane-bound organelles; prokaryotic cells do not.
Which of the following statements is the function of lysosomes?
Involved in generating ATP by aerobic metabolism
Destroy worn out organelles
Involved in the separation of chromosomes
Involved in modifying, sorting and transporting proteins and lipids
Plasmodesmata are….
used in energy transformation within the cell.
Typical of animal cells more than plant cells.
cross connections between cell walls.
found most frequently in bacteria.
Which of the following muscle tissues has a striated appearance?
I. Skeletal
II. Cardiac
III. Smooth
I and II only
I only
II and III only
I, II and III
1. In a hypotonic solution, an animal cell will …
lyse
experience turgor.
neither gain nor lose water.
shrivel.
As mitosis begins, a condensed chromosome consists of two …
centromeres.
centrioles.
chromatins.
chromatids.
In mitosis, the number of chromosome sets in daughter cells will be …
half the number in the parent cell.
twice the number in the parent cell.
the same as in the parent cell.
one fourth the number in the parent cell.
If short hair (L) is dominant to long hair (l), animals LL and Ll have the same …
genotypes
phenotypes
alleles
genes
If all offspring of a cross have the genotype Aa, the parents of the cross would most likely be…
AA x aa
Aa x Aa
Aa x aa
AA x Aa
A woman with type A blood and a man with type B blood could potentially have offspring with which of the following blood types?
Type A
Type B
Type AB
All of the above
Genes W, X , Y and Z are linked on the same chromosome. The following are the cross-over values between the genes.
W and X – 38%
W and Y – 26%
X and Z – 16%
Y and Z – 4%
The sequence of genes on the chromosome is …
W Y Z X
W Z Y X
X Z Y W
Y Z X W
In a population in Hardy-Weinberg equilibrium, 16% of the individuals show the recessive trait. What is the frequency of the dominant allele in the population?
0.84
0.36
0.6
0.4
A butterfly population has a rare homozygous recessive form hh that occurs at a frequency of 0.04. The population is in Hardy-Weinberg equilibrium for the trait. What is the frequency of the homozygous dominant form?
0.02
0.64
0.98
0.32
In DNA replication, the helix is unwound by which type of enzyme?
topoisomerase
primase
DNA polymerase
helicase
The function of mRNA is to ……
carry specific information from DNA and programmes protein synthesis.
hold a group of ribosomes together
transfer the genetic codes to ribosomal RNA
transfer the genetic codes to DNA
The function of tRNA is to ….
form a site for protein synthesis
transcribe the genetic code
transport specific amino acids to specific sites on the mRNA
synthesize amino acids
What is the function of lactose of the lac operon?
Binds to the promoter and prevents the repressor from binding to the operator
Binds to the operator and prevents the repressor from binding to the promoter
Binds to the repressor and prevents it from binding to the promoter
Binds to the repressor and prevents it from binding to the operator
Hydroxylamine is a mutagen. It converts cytosine to a compound which pairs up with adenine. If DNA is treated with hydroxylamine, the mutation which results is an example of a base ________
deletion
insertion
inversion
substitution
Frameshift mutation is caused by base insertion or deletion except in the case where the number of base pair involved is_____________
one
two
three
seven
One possible result of chromosomal breakage can be that a fragment reattaches to the original chromosome in a reverse orientation. This is called ______________
disjunction
translocation
deletion
inversion
Which of the following may result in polyploidy?
I Treatment with colchicine
II Crossing over
III Independent assortment of chromosomes
IV Non-disjunction
I and II
I and IV
II and III
II and IV
Errors during DNA replication, repair or recombination can lead to base-pair substitutions. Such changes are called _________________
conditional mutations
mutagens
spontaneous mutations
saltatory changes
Which statement is not true of plasmids?
Examples of plasmids include EcoRI and BamHI
They carry a small number number of genes
They replicate independently of the host’s chromosome
They are DNA molecules
Bacteria carrying a plasmid with an antibiotic resistance gene are important in cloning because __________________________
they help in screening
they can kill other bacteria
they can produce antibiotics for commercial purposes
they protect themselves after being released into the environment
Gene cloning technology involve _____________
non coding nucleotide sequences
plasmids
bacteria
B and C above
Which of the following are true of restriction enzymes?
I. It restrict transcription
II. It is found in all eukaryotic cells
III. It acts on palindromic sequences
IV. It is sensitive to changes in temperature and pH
I and II
I and III
II and IV
III and IV
Which of the following is not a tool used in recombinant DNA technology?
Cloning vector
RNA polymerase
Target DNA
DNA ligase
DNA ligase …….
seals plasmid and DNA fragments through the formation of phosphodiester bonds
cuts human DNA at specific nucleotides sequences
copies the bacterial gene
joins the vector and DNA fragments through the formation of phosphodiester bonds
Plasmids are important in biotechnology because they are
a vehicle for the insertion of foreign genes into bacteria
recognition sites on recombinant DNA strands
surfaces for protein synthesis in eukaryotic recombinants
surfaces for respiratory processes in bacteria
What are the advantages of asexual reproduction?
It promotes genetic stability
It enhances the survival rates of parents
The limited number of offspring prevents overpopulation
It promotes geographic distribution of species
In angiosperms, sperms are formed by
meiosis in the anther
meiosis in the pollen grain
mitosis in the anther
mitosis in the pollen tube
Which statement about the megasporocyte is true?
It undergoes meiosis to produce three haploid cells
It is a diploid cell located within an ovule
It divides mitotically to form a male gametophyte
It plays an important role in cross-pollination
In spermatogenesis, the primordial germ cells undergo differentiation to form
spermatids
sperms
diploid spermatogonia
haploid spermatogonia
In males, gonadotropin – releasing hormone stimulates the _________ to secrete _________ .
Anterior pituitary; inhibit
Anterior pituitary; FSH and LH
Anterior pituitary; testosterone
Posterior pituitary; FSH and LH
The function of the corpus luteum is to
nourish and protect the egg cell
secrete progesterone and estrogen
maintain pregnancy by production of human chorionic gonadotropin
produce prolactin in the milk sacs of the mammary gland
During an acrosome reaction, the acrosome…..
Detaches, allowing the sperm to penetrate the egg
Releases enzyme that digest the outer layer of the egg
Secretes calcium ions, which cause the sperm to fuse with the egg
Releases inhibin, which causes the sperm to bind to the egg
Which of the below is NOT a phase in individual growth?
Cell division
Cell maturity
Cell enlargement
Cell differentiation
What is the type of growth pattern for lizard.
Isometric
Allometric
Intermittent
Limited
