Section A: ANSWER ALL QUESTIONS
Total of 15 Marks: (each correct answer is worth half a mark)
MULTIPLE CHOICE: (only one correct answer, no minus marks)
1. Ribosomes are found _____.
A. within the cytosol
B. attached to endoplasmic reticulum
C. in the nucleus
D. in the Golgi apparatus
E. in chromosomes
F. both (A) and (B )
2. Ribosomes _____.
A. synthesize proteins
B. contain the DNA
C. synthesize lipids
D. store hydrolytic enzymes
E. synchronise the beating of cilia
F. both (A) and (B )
3. Which of the following is a function of the smooth endoplasmic reticulum?
A. steroid synthesis
B. solar energy absorption
C. enzyme synthesis
D. ATP synthesis
E. protein synthesis
F. All of the above
4. Proteins are modified, sorted and packaged by the ______.
A. plasma membrane
B. mitochondria
C. Golgi apparatus
D. Smooth Endoplasmic Reticulum (SER)
E. Rough Endoplasmic Reticulum (RER)
F. lysosomes
5. Bacteria that are engulfed by a white blood cell will be destroyed by
hydrolytic enzymes inside ______.
A. ribosomes
B. lysosomes
C. chloroplasts
D. mitochondria
E. centrioles
F. basal bodies
6. Which of the following correctly describes facilitated transport?
A. It requires the expenditure of energy.
B. Molecules move from high concentration to low concentration.
C. Specific carrier proteins are needed.
D. Vacuoles form to move materials.
E. all of the above.
F. (B) and (C) are correct.
7. Which of the following best describes active transport?
A. carrier proteins are needed.
B. it requires the expenditure of energy.
C. molecules move from areas of low concentration to areas of high
concentration.
D. all of the above.
E. (B) and (C) are correct.
F. (A) and (B) are correct
8. Cells that do a lot of active transport have many _____.
A. mitochondria
B. nuclei
C. chloroplasts
D. plasmids
E. centrioles
F. pores
9. Insulin leaves insulin-secreting cells by _____.
A. phagocytosis
B. receptor-mediated endocytosis
C. osmosis
D. exocytosis
E. pinocytosis
F. diffusion
10. Macrophages, immune system cells, engulf bacteria by _____.
A. exocytosis
B. facilitated transport
C. phagocytosis
D. osmosis
E. pinocytosis
F. diffusion
11. In Mitosis the sister chromatids separate from each other during _____.
A. prophase
B. telophase
C. anaphase
D. metaphase
E. interphase
F. cell division
12. In Mitosis the spindle begins to assemble during _____.
A. prophase
B. prometaphase
C. metaphase
D. anaphase
E. telophase
F. interphase
13. Meristem tissue is found in the ______of a plant.
A. root tips
B. shoot tips
C. Xylem tissue
D. in A and B above
E. Phloem tissue
F. region of elongation in roots
14. According to presently accepted cell theory….
A. The cells of all organisms divide
B. New cells only come from pre-existing cells
C. Cytokinesis in animal cells is accomplished by a furrowing process
D. In plant cells, the vesicles which move along microtubules to the midpoint
between the two daughter nuclei fuse to form a cell plate, which is later involved in the formation of the two plant cell walls
E. Only A, B, and C above are true
F. All of A, B, C, and D are true.
15. Daughter cells as a result of mitosis have a complete copy of _____.
A. chromosomes
B. genes
C. both A and B
D. organelles
E. All of A, B, and D.
F. none of the above
16. At the end of telophase II and cytokinesis there are ______haploid
cells.
A. two
B. four
C. six
D. eight
E. no
F. many
17. Cells have one chromosome from each homologous pair during _____.
A. prophase II
B. metaphase II
C. anaphase II
D. telophase II
E. all of the above
F. none of the above
18. The two sister chromatids separate at the centromere during _____.
A. prophase II
B. metaphase I
C. telophase I
D. anaphase II
E. prophase I
F. anaphase I
19. Sister chromatids align themselves at the metaphase plate (equatorial plate) during _____.
A. metaphase II
B. prophase I
C. anaphase II
D. interkinesis
E. metaphase I
F. prophase II
20. In animals the haploid cells produced by meiosis mature and become _____.
A. spores
B. zygotes
C. gametes
D. diploid
E. chromosomes
F. chromatids
21. Which of the following is not present during cnidarian
development?
A. ectoderm
B. mesoderm
C. endoderm
D. mesoglea
E. nematocysts
F. gastrovascular cavity
22. Some anemones live attached to the shells of hermit crabs. The anemones
provide protection and camouflage for the crab and the crab provides locomotion
for the anemone.
A.The anemones are in a polyp phase and have a parasitic relationship with the crab.
B. The anemones are in a polyp phase and have a commensalistic relationship with the crab.
C. The anemones are in a polyp phase and have a mutualistic relationship with the crab.
D. The anemones are in a medusa phase and have a parasitic relationship with the crab.
E. The anemones are in a medusa phase and have a commensalistic relationship with the crab.
F. The anemones are in a medusa phase and have a mutualistic relationship with the crab.
23. The class _____ of cnidaria includes the true jellyfishes.
A. Protozoa
B Mesozoa
C. Anthozoa
D. Hydrozoa
E. Scyphozoa
F. none of the above
24. All of the following are classified in phylum Cnidaria except _____.
A. jellyfish
B. sea anemones
C. hydra
D. tapeworms
E. corals
F. sea pens and sea fans
25. Roundworms have a(n) _____.
A. partially lined body cavity (Pseudocoelom)
B. complete digestive tract, with unbranched gut from mouth to anus
C. organ level of organization
D. unsegmented cylindrical body with no cilia
E. Cuticle of protein
F. all of the above
26. Earthworms have :
A. cephalization.
B. a swimming larval stage
C. many setae
D. flame cells for secretion
E. parapodia
F. None of the above.
27. Locomotion in earthworms utilizes _____.
A. muscle contraction
B. the setae
C. parapodia
D. both A and B
E. neither A or B
F . all of A, B, and C
28. In the circulatory system of the earthworm blood flows through:
A. the dorsal blood vessel,
B. five pairs of hearts, and
C. a ventral blood vessel.
D. This is called a closed system
E. The blood is red
F. all of the above is true.
29. Internal partitions called septa illustrate the presence of _____ in
annelids.
A. cephalization
B. segmentation
C. a respiratory system
D. a digestive system
E. an excretory system
F. all of the above
30. Mucus which prevents the sperm from drying out as it is passed between
earthworms is secreted by the _____.
A. crop
B. nephridium
C. clitellum
D. setae
E. testes
F. seminal vesicles
Section B: LONG ANSWER QUESTIONS
ANSWER 2 QUESTIONS (each total question is worth 10 marks)
Question 1
Describe the structure and function of five of the following:
a. the eukaryote nucleus
b. the mitochondrion
c. the chloroplast
d. eukaryote flagella and cillia
e. eukaryote membranes
f. striated and non striated muscles
g. bone tissue
Total of 10 marks for question : 2 marks for each section answered
Question 2.
Considering Bacteria, write notes on the following:
a. their reproduction and phases of growth, dependant on food availability, waste production and environmental conditions; (2marks)
b. their food requirements and factors affecting growth; (2 marks)
c. different types of growth media and techniques used to isolate and grow them (mentioning advantages, or disadvantages, or pitfalls associated with each);
(3 marks)
d. their economic importance. (3 marks)
Question 3.
Describe the adaptations for a parasitic mode of life, relating to features such as morphology, locomotion and reproduction, of two named species in two classes of parasitic Protozoa and note the economic and social impact the species have exerted throughout the world.
Total 10 marks: 5 marks for each class of Protozoa
Question 4
Write notes on two of the following Phyla, with examples of the species contained within these groupings:
A. Porifera B. Nematoda
C. Annelida D. Platyhelminthes
E. Mollusca F. Chordata
(Total 10 marks for question : 5 marks for each section)
Question 5
Critically assess what are the characteristics of life.
Total of 10 marks for question