Download MULTIPLE CHOICE (100 pts.) Write the CAPITAL letter of the best

Department of Biology
University of the Philippines Manila
BIOQUIZ 2009
ELIMINATION ROUND
AUGUST 26, 2009
Name: ____________________________
School: ___________________________
Score:______
MULTIPLE CHOICE (100 pts.) Write the CAPITAL letter of the best answer on the space provided before
each number.
____1. Below are the levels of organization. Choose the correct order from the simplest to the most complex.
a) Organisms, organ systems, organs, tissues, cells, organelles
b) Tissues, organ systems, organs, tissues, cells, organelles
c) Cells, organelles, organs, tissues, organisms, organ systems
d) Organelles, cells, tissues, organs, organ systems, organisms
____2. Prokaryotes include:
a) Plants and animals
b) Bacteria and fungi
c) Bacteria and blue-green algae
d) Protists and blue-green algae
____3. Which of the following statements is TRUE?
a) All cells have cell wall
b) Animal cells contain microtubules but plant cells do not contain microtubules
c) The Golgi apparatus is found only in animal cells
d) Chloroplasts are found in plant cells but not in prokaryotic or animal cells
____4. In 1914, it was discovered that DNA is a major constituent of chromosomes. This discovery was made
possible when _________ developed a stain specific for DNA molecules.
a) Gregor Mendel
b) Robert Feulgen
c) Waltor Sutton
d) Watson and Crick
____5. DNA became widely accepted as the genetic material when:
a) Mendel’s work was rediscovered
b) Sutton proposed the chromosomal theory of heredity
c) Watson and Crick published the double helix model of DNA structure
d) Feulgen developed a stain specific for DNA
____6. The stage of the cell cycle where each chromosome is composed of two chromatids in preparation for
Mitosis is called the-a) G1
b) S-phase
c) M-phase
d) G2
____7. Enzymes that are involved in triggering the events in the cell cycle are called:
a) Proteases
b) Transferases
c) Kinases
d) Nucleases
____8. Which sequence of the cell cycle is common to eukaryotes?
a) G1 – G2 – S – M – cytokinesis
b) G1 – M – G2 – S – cytokinesis
c) G1 – S – M – G2 – cytokinesis
d) G1 – S – G2 – M – cytokinesis
____9. The proteins which complex with DNA producing the “beads on a string” or nucleosomes are called:
a) Kinases
b) Proteases
c) Spindle fibers
d) Histones
____10. Which of the following features of cell division is very different for animal and plant cells?
a) Prophase
b) Metaphase
c) Anaphase
d) Cytokinesis
____11. Prior to cell division, each chromosome replicates or duplicates its genetic material. The products, which
are connected with a centromere, are called ________.
a) sister chromosome
b) homologous chromosomes
c) sex chromosomes
d) sister chromatids
____12. The first stage of mitosis when chromosomes start becoming visible under the microscope is called ______.
a) anaphase
b) prophase
c) telophase
d) telephase
____13. Which of the following statements is NOT true of mitosis?
a) A single nucleus gives rise to two identical daughter nuclei.
b) The daughter nuclei are genetically identical to the parent nucleus.
c) The centromeres divide at the onset of anaphase.
d) Homologous chromosomes synapse in prophase.
____14. Cytokinesis in a plant cell is characterized by:
a) the equal division of homologous chromosomes
b) a pinching off of the cell membrane to divide the cell
c) the formation of a cell plate in the cytoplasm
d) the movement of the chromosomes from the metaphase plate
____15. Which of the following is NOT considered an organelle?
a) nucleus
b) cell membrane
c) centrioles
d) mitochondria
____16. Glycolysis takes place in the __________.
a) cell membrane
b) cytoplasm
c) mitochondria
d) nucleolus
____17. All of the following are true about electron transport EXCEPT:
a) it occurs in the mitochondria
b) it produces ATP molecules
c) it occurs before Glycolysis
d) it occurs in a series of oxidation and reduction reactions
____18. In one complete turn of the Kreb’s cycle, what is the maximum number of ATP molecules that can be
produced in the Kreb’s cycle itself?
a) 0
b) 1
c) 2
d) 3
e) 4
____19. Which cannot be found in both mitochondria and chloroplasts?
a) ATP synthase
b) Electron transport chain
c) ATP
d) NADH
e) DNA
____20. Which is considered living?
a) chloroplasts
b) bacteria
c) mitochondria
d) nucleus
e) all of the above
____21. Sexual reproduction among animals is:
a) biologically costly
b) diverse in its details
c) evolutionary beneficial
d) all of the above
____22. Development cannot proceed properly unless each stage is successfully completed before the next begins,
starting with ________.
a) gamete formation
b) fertilization
c) cleavage
d) gastrulation
____23. A cell formed during cleavage is a ________.
a) Blastula
b) Morula
c) Blastomere
d) Gastrula
____24. __________ distributes different maternal messages to different blastomeres.
a) Gametogenesis
b) Cleavage
c) Morphogenesis
d) Pattern formation
____25. The astonishing internal complexity characteristic of most animals became possible following the evolution
of the ___________.
a) ectoderm
b) mesoderm
c) myoderm
d) endoderm
____26. Primary tissue layers first appear ______.
a) in the egg cortex
b) during cleavage
c) in the gastrula
d) in primary organs
____27. During development, the formation of subpopulations of different cell types is the outcome of __________.
a) selective gene expression
b) cell differentiation
c) metemorphosis
d) a and b
____28. The developmental fate of an embryonic cell lineage changes upon exposure to gene products from an
adjacent tissue. This process is called _________.
a) cleavage
b) cytoplasmic localization
c) embryonic induction
d) apoptosis
____29. Drosophila melanogaster (fruit fly) cleavage is _______.
a) Superficial
b) superfluous
c) radial
d) rotational
____30. During a menstrual cycle, a midcycle surge of ________ triggers ovulation.
a) estrogen
b) progesterone
c) LH
d) FSH
____31. In implantation, a _________ burrows into the endometrium.
a) zygote
b) gastrula
c) blastocyst
d) morula
____32. The _____ is a fluid-filled sac that surrounds and protects the embryo from mechanical shock and keeps it
from drying out.
a) yolk sac
b) allantois
c) amnion
d) chorion
____33. At full term, placenta ________.
a) is composed of extraembryonic membranes
b) directly connects maternal and fetal blood vessels
c) keeps maternal and fetal blood vessels separated
____34. Indirect development in animals
a) is present in all animals
b) lacks a larval stage
c) involves a larval stage
d) occurs only when the egg develops without fertilization
____35. Eggs with very little yolk that is evenly distributed in the egg are called ________.
a) mesolecithal
b) holoblastic
c) isolecithal
d) telolecithal
____36. The Deuterostomia is a group of animals that is characterized in their development by having ______.
a) a spiral cleavage
b) a mosaic development
c) a mesoderm that develops from a special blastomere called the 4d cell
d) a radial cleavage
____37. Wood consists of :
a) bark
b) periderm
c) secondary xylem
d) cork
e) secondary phloem
____38. Which of the following is not a part of an older tree’s bark?
a) Cork
b) cork cambium
c) secondary xylem
d) secondary phloem
e) lenticels
____39. Starting from the surface of a tree trunk and working to the center, the innermost tissue you will encounter
is the _______.
a) cortex
b) periderm
c) secondary xylem
d) pith
e) secondary phloem
____40. A seed develops from _______.
a) an ovum
b) a pollen grain
c) an ovary
d) an embryo
e) ovule
For nos. 41-42, read the following and answer the succeeding questions.
A pine tree grows in a forest. It matures, dies and falls to the forest floor where it begins to decay. Molds, mosses,
algae and microorganisms can be found living in and on the decaying log. Termites, worms, spiders and mice were
also found living in or on the decaying log.
____41. An example of a first level consumer in the above situation would be the _______.
a) termite
b) tree
c) algae
d) spiders
____42. The decaying log and all the organisms living in and on it could be considered a/an ________.
a) ecosystem
b) community
c) society
d) population
____43. In a certain community, field mice are preyed on by snakes and hawks. The entry of wild dogs into the
system adds another predator for the mice. Of the following, the most likely short-term result of this
addition is:
a) an increase in snake population
b) a tendency for hawks to prey on the dogs
c) migration of hawks to another community
d) extinction of the hawks
e) reduction in the number of mice
____44. If a caterpillar eats a seedling in your garden, the caterpillar is acting as a:
a) predator
b) parasite
c) competitor
d) density-dependent factor
e) saprophyte
____45. Organisms are given scientific names because:
a) Latin is the language of scholars
b) It gives taxonomists something to do
c) It makes communications about organisms easier
d) It frustrates amateur botanist
e) All of these
____46. The high levels of DDT found in birds of prey is an example of:
a) eutrophication
b) ecological concentrating effects
c) biological magnification
d) chemical cycling through an ecosystem
e) none of these
____47. The way in which a population interacts with other populations in an ecosystem is largely determined by its
habit and niche. A niche is
a) the type of physical place a species inhabits
b) the actual space a species occupies
c) a species’ function in its community
d) a community’s function in its ecosystem
____48. A group of interacting plants and animals, together with their physiochemical environment, is called ____.
a) a population
b) an ecosystem
c) a community
d) a niche
____49. What do you call individuals of the same species that occupy a given area?
a) a population
b) an ecosystem
c) a niche
d) a community
____50. Associations of two or more species over a given spatial dimension:
a) ecosystem
b) niche
c) community
d) habitat
____51. What will happen to the energy that entered the food web?
a) it will be converted to chemical energy
b) it will be converted to mechanical energy
c) it will be released as heat
d) it will be recycled by decomposers
____52. In which environment will you find the longest food chain?
a) tropical rainforest
b) open oceans
c) grassland
d) lakes
____53. What body symmetry is commonly associated with a highly developed or advance animal?
a) asymmetrical
b) radial
c) biradial
d) bilateral
____54. Which of the following insect does not possess a proboscis?
a) mosquito
b) fly
c) butterfly
d) dragonfly
____55. This taxon group is characterized by the presence of stinging cells on the surface of their epidermis.
a) cnidarians
b) poriferans
c) echinoderms
d) mollusks
____56. What is another term for molting, an event common among the arthropods?
a) ecdysis
b) syzygy
c) lysis
d) echinosis
____57. Which of the following echinoderms are plant-like?
a) crinoids
b) brittlestar
c) starfish
d) sea urchins
____58. Peanuts (Arachis hypogea) belong to what category of fruits?
a) nut
b) berry
c) legume
d) capsule
____59. An example of a bromeliad species is:
a) pineapple
b) guava
c) cashew
d) kamias
____60. Which among the ff. is an example of a eukaryotic cell?
a) blue-green algae
b) Bacillus subtilis
c) Amoeba sp.
d) E. coli
____61. An organism’s expressed physical trait, such as seed color or pod shape, is called its:
a) genotype
b) phenotype
c) cytosol
d) gamete
____62. An organism that has two different alleles for a single trait is said to be ______ for that trait.
a) heterozygous
b) haploid
c) homozygous
d) polyploid
____63. Mendel referred to the parental generation in the cross-pollination between two true-breeding plants as the
____ generation.
a) F1
b) P
c) F2
d) P2
____64. If the allele for green pod color (G) is dominant over the allele for yellow pod color (g), which of the
a)
b)
c)
d)
following genotypes would a plant with yellow pods have?
GG
gg
Gg
gG
____65. In the cross-pollination between a true-breeding yellow pod plant and a true-breeding green pod plant,
where green pod color is dominant, the resulting offspring (F1) will be:
a) ¼ green, ¾ yellow
b) all yellow
c) ¼ yellow, ¾ green
d) all green
____66. If the green F1 plants from the previous question are allowed to self-pollinate, what will be the phenotypic
ratio of the F2 progeny?
a) ¼ green, ¾ yellow
b) all yellow
c) ¼ yellow, ¾ green
d) all green
____67. In a cross between a green F1 plant from the previous question and another green pod colored plant with an
unknown genotype, the resulting offspring (F2) were all green. What is the genotype of the unknown plant?
a) GG
b) gg
c) Gg
d) Gg
____68. In the classical Mendelian cross, if two parents that are heterozygous for two traits are crossed, then the
expected phenotypic ratio of the F1 progeny will be:
a) 4:1
b) 3:1
c) 9:3:3:1
d) 8:4:2:2
____69. The number of chromosomes in a human sex cell is:
a) 12
b) 23
c) 46
d) 69
____70. The sex chromosomes for a male are:
a) XX
b) XY
c) YY
d) XO
____71. The parents of three boys are having another child. What is the probability that the child will be a girl?
a) 25%
b) 50%
c) 75%
d) 100%
____72. If genes for red flowers mask or hide the genes for white flowers, then the genes for red flowers are said to
be:
a) recessive
b) dominant
c) incomplete dominant
d) epistatic
____73. If red flowers are crossed with white flowers and the offspring are all pink flowers, the genes for the red
and white are:
a) co-dominant
b) heterozygous
c) incompletely dominant
d) homozygous
____74. The classical phenotypic ratios obtained by Mendel from a monohybrid and a dihybrid cross, respectively,
were:
a) 2:1 and 9:3:3:1
b) 3:1 and 9:3:3:1
c) 3:1 and 1:2:1
d) 1:2:1 and 9:3:3:1
____75. The genes that determine a sex-linked trait in humans are characteristically found in the:
a) X chromosome
b) pseudogene
c) kinetosome
d) autosome
____76. A dominant gene is one that:
a) is never expressed when homozygous
b) is always expressed when present
c) is expressed in all the offspring when both parents carry it
d) is only expressed when heterozygous
____77. Allelic genes:
a) control the same trait but produce different expressions of that trait.
b) control the same trait and produce the same expression of that trait
c) must be homozygous to produce the trait
d) are normally dominant
____78. Nonallelic genes on different chromosomes are:
a) Inherited independently
b) Linked.
c) Always inherited together
d) Are never homozygous
____79. In a dihybrid cross TtYy x TtYy, the genotypic ratio of TtYy in the offspring will be:
a) 1/16
b) 2/16
c) 3/16
d) 4/16
____80. The blue-eyed son of two brown-eyed parents marries a brown-eyed woman, and their child is blue-eyed.
Assuming brown eyes (B) are dominant over blue eyes (b), what is the genotype of the brown-eyed
woman?
a) BB
b) B’B
c) Bb
d) bb
____81. After a heavy meal, which of the following takes place?
a) increase in insulin secretion
b) increase in glucagon secretion
c) decrease in blood glucose
d) none of the above
____82. When blood oozes out of a cut skin, which of the ff. cells readily come to the rescue?
a) erythrocytes
b) thrombocytes
c) leukocytes
d) lymphocytes
____83. What hormone promotes stem elongation in plants?
a) gibberellins
b) cytokinines
c) abscissic acid
d) ethylene
____84. During glycolysis, ATP is formed through what type of phosphorylation?
a) Photophosphorylation
b) Oxidative Phosphorylation
c) Electron transport phosphorylation
d) Substrate phosphorylation
____85. All of the following are products of the Hill Reaction of photosynthesis EXCEPT:
a) reduced NADP
b) oxygen release
c) glucose
d ATP
____86. Which of the following is a meristematic tissue of plants?
a) companion cells
b) vascular cambium
c) sclerenchyma
d) vessel elements
____87. The parotid gland is a digestive gland located in the:
a) stomach
b) small intestine
c) pancreas
d) mouth
____88. In the double fertilization process of plants, one sperm nucleus joins an egg to produced a zygote, while the
other joins what cell/s to produce the endosperm?
a) generative nucleus
b) polar nuclei
c) synergids
d) antipodals
____89. Scurvy, which is characterized by bleeding gums, loose teeth, painful and swollen joints, is caused by the
deficiency of which vitamin?
a) Vitamin A
b) Vitamin B
c) Vitamin C
d) Vitamin D
____90. In human tissues, CO2 entering the plasma of the red blood cells forms a complex with hemoglobin to form
a) carbonic acid
b) carbaminohemoglobin
c) carboxyglobin
d) hemocarboxylin
____91. The smallest sub-unit of a muscle contraction is called :
a) sarcolemma
b) sarcomere
c) myosin
d) troponin
____92. The shrinking of plant cells when immersed in a hypertonic medium is termed:
a) plasmolysis
b) hemolysis
c) crenation
d) turgidity
____93. In animal cells, the release of an egg or eggs from the ovary to the oviduct is called:
a) corpus luteum
b) implantation
c) ovulation
d) oogenesis
____94. What group of cells in the stomach releases hydrochloric acid?
a) parietal cells
b) goblet cells
c) acinar cells
d) chief cells
____95. Filtration, reabsorption and secretion are functions of what structure/s in the kidneys ?
a) nephrons
b) cortical cells
c) Bowman’s capsule
d) ureter
____96. This naturally occurring plant hormone, in gaseous form, plays a major role in fruit ripening.
a) methylene
b) ethylene
c) oxygen
d) carbon dioxide
____97. Which type of artery is an exception to the generalization that arteries carry oxygenated blood?
a) coronary artery
b) systemic artery
c) cutaneous artery
d) pulmonary artery
____98. In the heart, adjacent muscle cells are electrically coupled at gap junctions. In mammals, these occur at
specialized regions of intercellular contact known as:
a) synapse
b) intercalated discs
c) desmosomes
d) motor end plates
____99. Stretching of the cardiac muscle tends to increase the vigor of heart contraction. This type of control is
described as:
a) neural
b) extrinsic
c) intrinsic
d) hormonal
____100. Sugar in plants is transported in the form of _______.
a) glucose
b) sucrose
c) fructose
d) mannose