SMJK PEREMPUAN CHINA PULAU PINANG
END OF YEAR EXAMINATION 2011
LOWER SIX BIOLOGY PAPER 1
TIME: 1 HOUR 45 MINUTES
Name: ……………………………………..
L6S….
Instructions
This paper contains 50 questions. Answer all.
1. Which diagram shows the semi-conservative replication of a section of a
molecule of DNA?
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2. What would be seen in an electron micrograph of a bronchus wall?
I cartilage cells
III smooth muscular cells
II ciliated cells
IV Schwann cells
A. I, II and IV
B. II, III and IV
C. I, II and III
D. I, III and IV
3. Consider the accompanying figure (Fig. 1) showing a hydrogen bond
between two water molecules. Which of the following properties of water
is not caused by this interaction?
Solid water (ice)
Liquid water
Fig. 1
A. High surface tension
B. Great cohesive strength
C. Low specific heat
D. Excellence as a solvent
4. In comparing solid water (ice) and liquid water, select the false
statement from the following choices.
A. The density of liquid water is less than that of solid water.
B. Hydrogen bonds continue to break and re-form in liquid water.
C. Hydrogen bonds hold water molecules in a rigid state in solid water.
D. In its solid state, each water molecule can be hydrogen-bonded to four
other water molecules.
5. Which of the following statements about starch is false?
A. The subunits in starch are all glucose.
B. Starch is insoluble since it cannot bind to water.
C. Starch is more similar to glycogen than it is to cellulose.
D. The degree of branching varies in different types of starch.
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6. The hexose sugar molecule in Fig. 2 has its six carbon atoms numbered.
Fig. 2
Which carbon atoms join by glycosidic bonds to form amylose and
amylopectin?
Amylose
Amylopectin
A.
1 to 4
1 to 4 and 1 to 6
B.
1 to 6
1 to 4 and 1 to 6
C.
1 to 4 and 1 to 6
1 to 4
D.
1 to 4 and 1 to 6
1 to 6
7. Which substance in prokaryotes contains sulphur?
A. DNA
B. Phospholipids
C. Proteins
D. Antibiotics
8. This figure (Fig. 3) shows the testosterone molecule. Which of the
following statements regarding these non-glycerol based lipids is true?
Fig. 3
I. Non-glycerol based lipid are water soluble.
II. Carotenoids are light absorbing pigments.
III. Steroids are derived from cholesterol.
IV. The vitamins B and C are lipid soluble.
A. I, and II
B. II and III
C. I and IV
D. III and IV
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9. Which of the following statements about the single-stranded RNA
molecule is false?
A. RNA cannot form complementary hydrogen bonds with other RNA
molecules.
B. The pentose sugar is ribose.
C. The ribonucleotide can form a base pair with a complementary
deoxyribonucleotide.
D. The ribonucleotide can form hydrogen bonds with a complementary
base.
10. In the eukaryotic cell, which one of the following is not a membranous
compartment?
A. Nucleus
B. Ribosome
C. Vacuole
D. Lysosome
11. The diagram below (Fig. 4) shows the structure of a chloroplast.
Fig. 4
What is the structure labelled X?
A. Ribosome
B. Stroma
C. Inner membrane
D. Thylakoid
12. Which of the following statements regarding the process of cell
fractionation is false?
A. Cell fractionation can be used to separate organelles from a tissue
sample.
B. Cell fractionation separates components based on size.
C. Cell fractionation separates components based on density.
D. Cell fractionation requires the use of intact cells during the process of
centrifugation.
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13. Which pair of factors is inversely proportional to the rate of diffusion?
A. concentration gradient and surface area over which diffusion occurs
B. distance over which diffusion occurs and size of diffusing molecule
C. size of diffusing molecule and concentration gradient
D. surface area over which diffusion occurs and distance over which
diffusion occurs
14. Which of the following microscope-function pairs is mismatched?
A.
B.
C.
D.
Microscope
Optical microscope
Transmission electron
microscope
Scanning electron
microscope
Phase contrast microscope
To study about …
Changes in shape of an erythrocyte
Ultrastructure of an animal cell
Detailed structure of a mitochondrion
Living non-pigmented small specimen
15. Which of the following about compact bone is incorrect?
A. It consists of living cells embedded in a matrix mainly of chondrin.
B. It is made up of numerous Haversian systems.
C. Osteoblasts are found in lacunae between the lamellae.
D. Canaliculi connect the lacunae to each other.
16. Consider the transmission electron micrograph (EM) shown here. Which
of the following statements about this EM is true?
Fig. 5
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A. The organelle shown is a chloroplast; the arrow points to a thylakoid.
B. The organelle shown is a mitochondrion; the arrow points to a cristae.
C. The organelle shown is the Golgi apparatus; the arrow points to a medial
cisterna.
D. The structure shown is endoplasmic reticulum (ER); the arrow points to
rough ER.
17. The process shown in the following figure is called _______.
Fig. 6
A. diffusion
B. exocytosis
C. facilitated diffusion
D. endocytosis
18. In the diagram shown here, the dead,
large, hollow, elongated cells are
____I___, and they are part of the
____II___ tissue system.
Fig. 7
A.
B.
C.
D.
I
vessel elements
sieve tube elements
vessel elements
tracheids
II
vascular
vascular
ground
vascular
19. Select the false statement about primary growth of the root primary
meristems.
A. Root hairs are derived from the procambium via the pericycle.
B. The root apical meristem produces the primary root meristems.
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C. The procambium produces xylem and phloem.
D. There is no clear delineation between the three growth zones of the
root.
20. The four major tissue types that comprise the human body include all of
the following EXCEPT ______.
A. epithelial tissue
B. muscular tissue
C. areolar tissue
D. nervous tissue
21. The specific type of cell that comprises most diffusion membranes is a
______.
A. squamous epithelial cell
B. cuboidal epithelial cell
C. columnar epithelial cell
D. exocrine cell
22. Complete the following sentence concerning the two coupled reactions
shown here:
ADP + Pi  ATP is an ____I___ reaction, ATP  ADP + Pi is an
____II____ reaction, and the conversion of ADP + Pi to ATP
____III____ energy.
A.
B.
C.
D.
I
exergonic
exergonic
endergonic
endergonic
II
endergonic
endergonic
exergonic
exergonic
III
releases
requires
releases
requires
23. Which of the following statements about the comparison of the enzyme
catalysed reaction and enzyme uncatalysed reaction is false?
A. The catalyzed reaction has a lower ΔG.
B. The catalyzed reaction has a lower energy of activation.
C. The reaction will occur at a slower rate in the absence of a catalyst.
D. The products formed in the catalyzed and uncatalysed reactions are
identical.
E. The catalyzed reaction will reach equilibrium faster than the uncatalysed
reaction.
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24. Which is correct for the non-competitive inhibition of enzymes?
Inhibitor resembles substrate Inhibitor binds to active site
A.
Yes
Yes
B.
Yes
No
C.
No
Yes
D.
No
No
25. This figure (Fig. 8) shows the effect of pH on the activity of the enzymes
pepsin, salivary amylase, and arginase. Each enzyme has a different
molecular substrate.
Consider a solution (solution 1) with equal concentrations of all three
substrates for the three enzymes along with another solution (solution 2)
containing all three enzymes. The fastest way to obtain a solution
containing only pepsin substrate (removing the substrates for salivary
amylase and arginase) from solution 1 is to adjust the pH of solution 1 to
_______ and add the enzyme solution (solution 2).
Fig. 8
A. 2
B. 7
C. 8
D. 10
26. RNA and DNA differ in a number of ways. Which one of the following is
not a difference?
A. RNA is primarily a single-stranded molecule.
B. The type of sugar present is different between the two.
C. Uracil is utilized in RNA instead of thymine in DNA.
D. RNA is a polynucleotide whereas DNA is not.
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27. The central dogma is sometimes presented diagrammatically as
shown. Which of the following statements about the central dogma is
false?
Fig. 9
A. The arrow from DNA to RNA represents transcription-DNA-directed
RNA synthesis.
B. Information never moves from RNA to DNA.
C. The molecule involved in the flow of information from RNA to protein is
transfer RNA.
D. Information never flows from protein to nucleic acids.
28. In the genetic code shown, what amino acid is coded for by the triplet
nucleotide sequence 3'-GTA-5' on the template DNA strand?
Fig. 10
A. Valine
B. Histidine
C. Tyrosine
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D. Proline
29. Which of the following statements about transfer RNA (tRNA) is true?
A. Each tRNA anticodon is specific for one codon.
B. The 3' end of the tRNA molecule varies depending on the amino acid it
will bind.
C. Activating enzymes (aminoacyl-tRNA synthetases) link together a
specific amino acid with a specific tRNA.
D. A DNA master codon of 3'-TAC-5' would have an anticodon on a tRNA
of 3'-CAU-5'.
30. What happens during the formation of Okazaki fragments?
A. DNA polymerase III adds nucleotides in the 3′→5′ direction.
B. DNA polymerase III adds nucleotides in the 5′→3′ direction.
C. DNA polymerase I adds nucleotides in the 5′→3′ direction.
D. RNA polymerase adds nucleotides in the 3′→5′ direction.
31. What is removed during the formation of mature RNA in eukaryotes?
A. Exons
C. Promoter
B. Introns
D. RNA primer
32. Below is a list of 5 steps that occur during the initiation of translation.
Which of the following would be considered the third step in this
process?
I
II
III
IV
V
A. I
Large ribosomal subunit binds to mRNA.
Anticodon of methionine-tRNA base pairs with its anticodon on
mRNA.
Small ribosomal subunit binds mRNA.
Anticodon of charged tRNA base pairs with the codon at the A site.
Peptide linkage forms.
B. II
C. III
D. IV
33. Which one of the following statements describes a feature of a natural
system of classification which an artificial system does not have?
A. A natural system of classification is based on phenotypic characters.
B. A natural system of classification is based on analogous structures.
C. A natural system of classification is based on evolutionary relationships
between organisms.
D. A natural system of classification is based on single characteristics
rather than several similar features.
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34. The following dichotomous key was made to identify different groups of
organisms.
A1
Unicellular organism ………………………….…… organism Q
A2
Multicellular organism ……………………………... go to B
B1
Enteron present ………………….…………………. organism R
B2
Enteron absent ……………………….………..…… go to C
C1
Coleom present …………………….……….……… go to D
C2
Coleom absent ……………………..………..…….. organism S
D1
Chitinous exoskeleton present ……….……….….. go to E
D2
Chitinous exoskeleton absent ………………….… organism T
Among organisms Q, R, S and T, which organism belongs to the phylum
Annelida ?
A. Organism Q
B. Organism R
C. Organism S
D. Organism T
35. Which of the following is not found among the protoctist groups?
A. Pseudopodia
B. Contractile vacuoles
C. Pellicles
D. Collagen
36. Which of the following events is/are not part of a typical fungal life cycle
involving asexual reproduction?
A. Formation of a dikaryon
B. Hyphae developing into a mycelium
C. Formation of a diploid zygote
D. Plasmogamy, which occurs when hyphae fuse at their tips
37. Which of the following are features of prokaryotes and eukaryotes?
A.
B.
C.
D.
70S
ribosomes
prokaryote
eukaryote
eukaryote
prokaryote
80S
ribosomes
eukaryote
prokaryote
prokaryote
eukaryote
Naked
DNA
prokaryote
eukaryote
prokaryote
eukaryote
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DNA associated
with proteins
eukaryote
prokaryote
eukaryote
prokaryote
38. Which phylum does the plant below belong to? B
Fig. 11
A. Angiospermophyta
B. Filicinophyta
C. Coniferophyta
D. Bryophyta
39. Which of the following is not a characteristic of gymnosperm
reproduction?
A. Cones composed of a cluster of scales are used in the process.
B. Megasporangium is enclosed within integument.
C. Different cones produce megaspores and microspores.
D. Water is required to assist transfer of pollen grains to gametophytes.
40. Angiosperms (such as the dandelion shown here) and gymnosperms
reproduce using seeds. Which of the following statements about seeds
is false?
A. The seed develops on the parent sporophyte.
B. The seed contains an embryonic stage of a young sporophyte.
C. Endosperm is the female gametophyte.
D. The seeds of angiosperms and gymnosperms represent a resting stage,
viable for many years.
41. Which of the following structural parts of a sponge is responsible for
creating water currents and capturing food?
A. Choanocytes
B. Amoeba-like cells
C. Oscula
D. Spicules
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42. Which of the following statements about flatworms (freshwater planaria
Duglesia sp.) is false?
A. Flatworms that can move, do so by ciliary action.
B. Flatworms have a complete tubular digestive system.
C. Parasitic flatworms such as tapeworms frequently lack a digestive
system.
D. Most of the species of living flatworms are parasitic.
43. The millipede (shown) is a myriapod. Which of the following
statements about the myriapods is true?
A. Myriapods have three pairs of legs.
B. Myriapods have three body regions: head, thorax, and abdomen.
C. Myriapods are strictly predatory.
D. Myriapods have a flexible, segmented trunk.
44. In the mollusks like snails, which of the following structures partly
encloses an external cavity in which the gills lie?
A. Radula
B. Visceral mass
C. Mantle
D. Coelom
45. Competition between species will be greatest if they try to occupy the
same
A. Community
B. Ecosystem
C. Habitat
D. Niche
46. The diagram represents a pyramid of energy which shows energy loss
from a food chain to decomposers, upward transfer of energy to the next
trophic level and energy loss through respiration.
–2
–1
All figures are in kJ m
y .
Fig. 12
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What is illustrated by this diagram?
A. A pyramid of energy shows the nutrient transfer less clearly than a
pyramid of numbers
B. Energy loss to decomposers is higher than respiratory loss
C. Food chain efficiency is about 10%
D. The energy of the final trophic level is not used
47. The diagram shows an arctic ecosystem.
Fig. 13
How many trophic levels are represented?
A. 5
B. 6
C. 7
D. 8
48. In a graph of an exponential growth curve, the rmax would be considered
the _______ of the population.
A. intrinsic rate of increase
B. carrying capacity
C. logistic growth rate
D. exponential growth rate
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49. Population size is influenced by certain factors.
If I = immigration, E = emigration, N = natality, M = mortality and
(N + M) = (I + E) = 0, which phase is this population in?
A. Exponential phase
B. Lag phase
C. Plateau phase
D. Growth phase
50. A uniform dispersion pattern implies that members of a population:
A. Cooperate in rearing their offspring.
B. Work together to escape from predators.
C. Use resources that are patchily distributed.
D. May experience intraspecific competition for vital resources.
Prepared by Yeap Chee Beng
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