FIRST CAT ONE

 

                                       

CONTINOUS ASSESMENT ONE

MODULE CODE: PST 05210

MODULE NAME: BASIC PHARMACOGNOSY

                                                                  

TIME: 2:00 HOURS                                                             DATE: ……………………….

GENERAL INSTRUCTIONS:          

1.      Read all instructions carefully.

2.      Write your examination number on every page of question paper and answer sheets.

3.      Cellular phones are not allowed in the examination room.

4.      Each essay question should be answered on not more than three (3) hand written pages.

5.      No additional answer sheet will be provided.

6.      Failure to follow instructions will lead to the loss of marks.

                                                     FOR OFFICIAL USE ONLY                                                    

SECTION	TYPES OF QUESTIONS	ALLOCATED MARKS	SCORED MARKS	INITIALS OF MARKER	INITIALS OF VERIFIER
A	MULTIPLE CHOICE	10
B	MULTIPLE TRUE/FALSE	10
C	MATCHING ITEMS	10
D	SHORT ANSWER	40
E	ESSAY	30
TOTAL		100

SECTION A: MULTIPLE CHOICE QUESTIONS                                             (10 MARKS)

Instructions:

·         This section consists of ten (10) questions

·         Choose the LETTER of the most correct answer and write it in the box provided using CAPITAL letter

·         One mark will be awarded for each correct answer

·         Response with SMALL letter will NOT be awarded any mark

 

1.      Which of the following is not correct regarding to secretory tissue?

a.       Secreted substance may remain deposited within secretory cell itself or may be excreted (released from the cell)

b.      Other secretions are useful in plants e.g Tannins

c.       Secretory structures may be single cells or group of cells (glands)

d.          The latex cells (produce latex) are found e.g. in Cannabis sativa

e.        Oil cells occur in ginger, pepper, mace, cardamoms, cinnamon and cassia

 

2.        The plastid that is responsible for storage of lipids in plant cell is?

a.      Amyloplasts

b.      Elaioplast

c.       Proteinoplast                                                                                                                                                    

d.      Chromoplast

e.      Chloroplast

3.      An example of vegetative by corms is…...

a.       Garlic  

b.      Turmeric  

c.       Saffron                                                                                                                              

d.      Peppermint

e.      Mint

 

4.      Which of the following is not correct concerning of vessels?…………………

a.        Are perforated at the end walls

b.      The lumen is wider than that of tracheids

c.       The perforated plates at the end wall separate the vessels

d.      Arranged perpendicular to the long axis of the plant body

e.      Are absent in pteridophytes and gymnosperms

                                                                                                                                                                                                                                                                 

 

5.      Root hairs is found in which zones of the root?

a)      Zone of differentiation

b)      Zone of elongation

c)      Zone of maturation                                                                                 

d)      Zone of thickness

e)      Zone of division

6.      A flower pollinated by birds have the following features…

a)      May have pollens which floats on water

b)      Have white flowers with strong fruity smell and open at night

c)      Are log tube shaped, have bright red or yellow colours, and with no fragrance 

d)      Have bright colours, sweet fragrance and produce nectar

e)      have large stigmas, no or little fragrance, and non- sticky pollens

 

7.       Which of the following plant shows mutual dependant organisms (beneficial) symbiosis?

a.      Digitalis

b.      Ocimum basilicum

c.       Belladonna and mustard                                                                       

d.      Urtica dioica

e.      Nicotiana

8.      A structure that arises from the testa near the hilum is called ……..

a.      Elaiosome

b.       Caruncle

c.        Embryo                                                                                                            

d.       Tegmen

e.       Micropyle

 

9.      A structure of young bark which may be composed of parenchyma or fibres, groups of fibres often occur opposite each group of phloem is ………..

a.       Endodermis

b.        Primary cortex

c.       Epidermis                                                                                                          

d.      Phloem

e.      Pericycle

 

 

10.  Which of the following statement(s) regarding Cambium is correct...

a.      It is composed of parenchyma cells with intercellular spaces

b.      It consists of pericycle, vascular bundles and pith

c.       The innermost layer of the cortex is the endodermis                                            

d.      lies below the epidermis

e.        Consists of brick shaped and thin walled meristematic cells

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SECTION B: MULTIPLE TRUE/FALSE QUESTIONS                                    (10 MARKS)

INSTRUCTIONS:

·            This section consists of Four (4) questions with five (5) options each

·            Write the word “TRUE” and NOT letter ‘T’ for a correct statement and the word “FALSE” NOT letter ‘F’ for incorrect statement in the space provided before each option

·            All responses should be in CAPITAL letters

·            Half (½) a mark will be awarded for each correct response

·            Responses with letters “T” and “F” will not be awarded any mark

·            There will be a penalty of half (½) of allocated marks for responses with small letters.

 

 

 

1.       Characteristics features of Ground or Fundamental Tissue System

A.      …………… In monocot stem, ground tissue system is a continuous mass of sclerenchymatous tissue in which vascular bundles are found scattered

B.      ……………  These cells are arranged in a single layer with intercellular spaces

C.      ……………  Form the main body of the plants (bulk of plant)

D.      ……………  Includes all the tissues except epidermis and vascular bundles

E.       ……………  In the leaves, ground tissue is made of chlorenchyma tissues forming the mesophyll

 

2.       Sieve elements……….

A.      ……………   Their end walls are transverse or oblique 

B.      ……………  Have cytoplasm and a prominent nucleus

C.      ……………  are imperforate cells with bordered pits on end walls arranged one above the other

D.      ……………   Arranged parallel to the long axis of the plant body

E.       …………… In matured sieve tube, nucleus is absent

3.       Regarding characteristics of parenchyma Tissues

A. …………… Is the precursor of all the other tissues

B. ……………  Form the ground tissue in a plant

C. ……………   Have dense cytoplasm with large nuclei

D…………… Their cell walls are thin, elastic and made up of cellulose

E. ……………  Have smaller vacuoles, scattered throughout the cytoplasm

4.       Which of the following statements is/are correct concerning of Dicot stem Cortex

A. ……………   It lies above the epidermis

B…………… the third zone made of barrel shaped cells arranged compactly without intercellular spaces

C. ……………  The second zone rich in starch

D…………… First zone consists of a single layer of parenchymatous rectangular cells

E…………… Some resin ducts occur in second zone

 

SECTION C: MATCHING ITEMS QUESTIONS                                    (10MARKS)

INSTRUCTIONS:

·         This section consists of two (2) questions matching with five (5) options each.

·         USE CAPITAL LETTERS

·         Each correct response is awarded one (1) mark.

·         Each item from column B is used only once

2.      PART ONE: Match descriptions in column B with responses in column A by writing the letter of the correct response in the space provided on each option.

COLUM A	ANSWERS	COLUM B
1. spike		A.      In this type flattened and expanded peduncle is present, called as receptacle B.      Axis is shortened and bears flowers at its top which are having equal stalk and arranged in centripetal succession C.      Inflorescence similar to umbel type, except D.     the flowers are sessile, i.e. acacia. E.      In this inflorescence the peduncle is short with numerous small unisexual flowers F.       similar to raceme, with sessile flowers G.     Peduncle is short, flowers bracteates H.     In this type of inflorescence the peduncle is long
2. Corymb
3. Umbel
4. Capitulum or Head
5. Raceme

 

 

 

 

 

 

 

 

 

 

PART TWO: Match the sign of damages in column B with examples in column A by writing the letter of the correct answer i the space provided

 

COLUM A	ANSWERS	COLUM B
1........ Companion cell		A.      Usually absent in monocots B.     vascular cambium C.     Have cytoplasm and a prominent nucleus D.    formed from pro-cambium of apical meristem E.     Are the only dead tissue in the phloem F.      In matured , nucleus is absent G.    Arranged parallel to the long axis of the plant body
2.........      Sieve Elements
3.........  Phloem Parenchyma
4.........   Phloem fibres
5 .........     Primary phloem

SECTION D: SHORT ANSWER QUESTIONS                                                  (40 MARKS)

INSTRUCTIONS:

·         This section consists of eight (8) questions.

·         Write your answers in the space provided on each question

·         Write a readable handwrite; DIRTY WORK IS NOT ALLOWED.

 

1.       With at least two examples for each, describe why collection should be done at the right time when active constituents are at the highest levels                                                             4 marks

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 

2.       Mention six medicinal plants in which its species name usually indicates certain characteristics of the plant                                                                                                                                    6 marks

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 

3.        List four differences between leaf and leaflet 4 marks

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4.       A.  Mention four medicinal plant which require slow drying at a moderate temperature when enzymatic action is encouraged 2marks

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

B. list four drugs which use air drying 2marks

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5.       Outline five characteristics features of Rhizodermis 5marks

 

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..

 

 

6.       Outline six advantages of Asexual propagation 6 marks

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..

 

7.       Describe how day length (sun light) affect cultivation of medicinal plant 5marks

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..

 

 

8.       With two examples of each types, list three types of covering trichomes 6 marks

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 

 SECTION E: GUIDED ESSAY QUESTIONS                             (30 MARKS)

INSTRUCTIONS:

·         This section consists of Two (2) questions which are supposed to be answered in a narrative way

·         Write your answer on the empty pages of this question paper; each question should start on a new page.

·         There will be a penalty of THREE (3) marks if questions are not answered in essay form

 

1.       With good diagrams, explain three types of vascular bundles according to the arrangement of xylem and phloem   15 MARKS

2.      Explain classification of the leaf based on the following; 15 MARKS

§    Arrangement on the stem -4 types

§   Divisions of the lamina -2 types

§      Leaf margin-5 types

§      Leaf Apex-5 types

§        Surface of the leaf -5 types

                                                                            

 

 

 

 

 

 

 

 

 

 

 

 

                                                                                                

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