WorksheetsBrain Out
Total questions: 25
Worksheet time: 17mins
Marchantia sp. is classified under which phylum?
Hepatophyta
Lycopodiophyta
Chlorophyta
Bryophyta
Most conifers have separate male and female reproductive parts on the same tree. This condition is referred to as
dioecious
heterosporous
monoecious
homosporous
Sponges are separated by other animal phyla because
lack true tissue
sessile
radial symmetry
feeding mode by filter feeders
What are the male sex organs of bryophytes that produce sperm cell?
Archegonia
Sporophyte
Antheridia
Anthers
The figures above show two types of natural selection, M and N, in a population.
Which of the following statements are correct?
I In M, only one extreme phenotype is favoured
II The extreme phenotypes in N are eliminated
III N tends to act to prevent changes in forms and functions
I only
I and III only
I and II only
I, II and III
Which of the following is a postzygotic isolationg mechanism?
Gametic isolation
Behavioral isolation
Temporal isolation
Hybrid breakdown
High frequencies of rare genetically inherited traits in people who share a common ancestor is most likely the result of
Huntington's disease
founder effect
bottleneck effect
natural selection
The total number of individuals of the same species that occupy a given area at a given time is the
population growth
population size
carrying capacity
intraspecific competition
_____ is the average number of individuals of the same species per unit of surface area at a given time.
Population growth
Population size
Population density
Carrying capacity
A population's carrying capacity is
the population size that can be supported by the available resources found within the habitat
reached when the number of deaths exceeds the number of births
when a population size decrease after a certain period of time
the average number of individuals of the same species per unit of surface area at a given time
Some enzyme require X to function efficiently. What does X represent?
I Inorganic ion
II Prosthetic group
III Coenzyme
I only
I and II only
II and III only
I, II and III
Which of the following is not an example of enzyme cofactors?
I amylase
II Fe2+
III Nicotinamide adenine dinucleotide
I only
I and II only
II and III only
I, II and III
In non-competitive inhibitor, the allosteric inhibitor
binds to the active site, preventing the substrate from binding to the enzyme
binds to the substrate, preventing it from binding to the active site
binds to the enzyme at a site away from the active site, altering the shape of the enzyme
changes the pH of the environment that the enzyme acts in
Which of the following reaction involves a homolytic cleavage
A
B
C
D
Which substituent is more priority?
Ketone
Alkene
Alkyne
Carboxylic acid
Name the compound below
trans-2,3-dibromo-2-hexene
cis-2,3-dibromo-2-hexene
trans-2,3-dibromo-3-hexene
trans-4,5-dibromo-4-hexene
Use the table above to select the correct answer.
A
B
C
D
I only
I and II only
II and III only
I, II and III
A
B
C
D
A
B
C
D
A
B
C
D
Which one of the following would you expect to have the highest boiling point?
CH3CH2CH(CH3)CH3
CH3CH2CH2CH2Cl
CH3CH2CH2CH2OH
CH3CH2OCH2CH3
Name the compound above.
4-isopropyl-2-hexanol
3-isopropyl-5-hexanol
4-ethyl-5-methyl-2-hexanol
4-isopropyl-2-pentanol
Which of the following statement is NOT true?
Alcohol is more polar than haloalkane
Methanol is the simplest alcohol
Ethanol can be prepared by fermentation
Solubility of alcohol in water increases with number of carbon atoms
Classify the following haloalkane.
(CH3)3C(Br)
Primary
Secondary
Tertiary
