An Ceardcholaiste Reigiunach Sligeach

An Ceardcholaiste Reigiunach Sligeach

Section A:ANSWER ALL QUESTIONS

Total of15 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. Heart cells are able to contract in unison because of the flow of ions

through _____.

A. gap junctions

B. tight junctions

C. plasmodesmata

D. adhesion junctions

  1. lignin deposits

F. cellulose fibrils

7. All cells have a _____.

A. cell wall

B. plasma membrane

C. nucleus

D. flagellum

E. cilia

F. mitochondria

8.Which of the following will not be found in abundance in an insulin producing pancreas cell?

  1. Rough Endoplasmic Reticulum (RER)
  2. Exocytosis
  3. Golgi apparatus
  4. Chloroplasts
  5. Ribosomes
  6. Vesicle formation

9. People may get injections of ______, a component of the extracellular matrix of animal cells , to get rid of their wrinkles.

A. collagen

B. cholesterol

C. fat

D. glycogen

E. cellulose

F. chromatin

10. In multicellular organisms Cell division can lead to which of the following _____.

A. growth

B. repair

  1. both A and B when undertaken in an organised / controlled fashion
  2. cancerous growth when it occurs in an unorganised / controlled fashion
  3. all of the above
  4. none of the above

11. Which best describes prokaryotes?

  1. unicellular bacteria

B. no prominent membrane bound nucleus

C. many chloroplasts

D. no membrane bound organells

E. (A), (B) and (D)

F. all of the above

12. Chromosomes are composed of _____.

A. DNA only

B. proteins only

C. DNA and proteins

D. RNA only

E. DNA, RNA and proteins

F. DNA, RNA, ribosomes and proteins

13. Prokaryotes' DNA is found _____.

A. in their nucleoid

  1. in their nucleolus
  2. in their nucleus
  3. scattered throughout their cytoplasm
  4. in their mitochondria
  5. bound to numerous proteins attached to their cell wall.

14. Prokaryotes reproduce _____.

A. by binary fission

  1. sexually
  2. very slowly
  3. by conjugation
  4. after mitosis
  5. after meiosis

15. Which process ensures that each newly formed cell gets its own copy of the

DNA?

  1. transcription
  2. translation

C. replication

  1. cytokinesis
  2. mitosis

F. meiosis

16. During synapsis, a nucleoprotein lattice holds the _____ together.

A. sister chromatids

B. bivalent

C. centromeres

D. centriols

E. spindle fibres

  1. aster

17.Chromosomes contain _____.

A. proteins

B. DNA

C. both A and B

D. ribosomes

E. RNA

F. NAD

18. The combining of chromosomes from genetically different gametes occurs

during _____.

A. crossing over

B. synapsis

C. meiosis II

D. fertilization

E. replication

F. duplication

19. The chromosomes in one gamete have a different combination of genes than

chromosomes in another gamete due to _____.

A. crossing over

B. independent alignment of bivalents at the metaphase plate

C. fertilization

D. cytokinesis

E. replication

F. duplication

20. Which of the following occurs during prophase I?

A. spindle forms

B. the nuclear envelope fragments

C. synapsis

D. all of the above

E . chromatids move apart

F. centromeres divide

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. The phylum Echinodermata and Chordata contain/ have the _____.

A. protostomes , with their mouth arising from or near the blastopore

B. deuterostomes , with their mouth arising some distance away (anteriorly) from the blastopore

C. organisms who’s embryos have spiral cleavage and determinate development

D. organisms who’s embryos have radial cleavage and indeterminate development

  1. both B and D
  2. both A and C

27. Which of the following is an example of an echinoderm?

A. octopus

B. tunicate

C. shrimp

D. sea cucumber

  1. worm

F. clam

28. Echinoderms have _____.

A. hydrostatic skeletons

B. exoskeletons

C. endoskeletons

  1. a test
  2. a water-vascular system
  3. all of C, D, and E.

29. Sea urchins and sand dollars use their spines for _____.

A. burrowing

B. locomotion

C. defence

D. all of the above

E. both B and C only

F both A and C only

30. Each arm of a starfish (sea star )_____.

A. contains gonads

B. has a light-sensitive eyespot at the tip

C. contains a pair of digestive glands

D. has an internal water vascular system, containing a radial canal with a connection to tube feet. projecting through holes in the oral (ventral) surface of the arm along a grooved region

E. has a spiny skin on its outer surface, with spines projecting from the endoskeletal plates offering some protection; has tiny pincer-like structures (or claws) called pedicellaria which can keep organisms and small particles off its outer skin surface;

F. all of the above

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:

  1. their reproduction and phases of growth, dependant on food availability, waste production and environmental conditions; (2marks)
  2. their food requirements and factors affecting growth; (2 marks)
  3. different types of growth media and techniques used to isolate and grow them (mentioning advantages, or disadvantages, or pitfalls associated with each);

(3 marks)

  1. 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 parasiticProtozoa 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. CnidariaB.Nematoda

C. AnnelidaD.Platyhelminthes

E.MolluscaF.Uniramia

(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

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