RAINBOW INTERNATIONAL SCHOOL
PERIODIC ASSESSMENT I ( 2024 – 25)
SUBJECT: BIOLOGY (044)
Class: XI Duration: 40 mins
Date: 15.07.24 REVISION WORKSHEET Max marks: 20
General Instructions:
1. The Question Paper contains four sections and 11 questions.
2. Section A has 07 questions of 01 mark each.
3. Section B has 02 questions of 02 marks each.
4. Section C has 01 question of 04 marks each.
5. Section D has 01 question of 05 marks each.
6. All questions are compulsory. However, internal choices have been provided in some questions.
A student has to attempt only one of the alternatives in such questions.
7. There is no overall choice.
8. Wherever necessary, neat and properly labelled diagrams should be drawn.
SECTION A
(07 X 01 = 7)
Choose the correct answer:
1. Which among the following is an Order?
(a) Malvales.
(b) Polypetalae.
(c) Angiospermae.
(d) Leguminaceae
2.Blue-green algae belong to which of these categories?
(a) Archaebacteria (b) Eubacteria (c) Algae (d) None of the above.
3. The Classification based upon easily observable character is called________
(a) Natural.
(b) Phylogenetic.
(c) Artificial.
(d) Chemotaxonomy.
4. Seed bearing plants includes____.
(a) Pteridophytes and gymnosperms.
(b) Bryophytes and Pteridophytes.
(c) Gymnosperms
5.The related families are placed together in the same ________.
(a) Phylum.
(b) Class.
(c) Genera.
(d) Order.
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6. On the basis of structural form lichen are..
(a) Crustose (b) Foliose (c)Fruticose ( d) All of three.
7. Mycobiont and Phycobiont are found in
(a) Mycorihiza
(b) Root
(c) Lichens
(d) BGA
SECTION B
(02 X 02 =4)
Answer the following questions briefly.
8. What are the differences between Taxonomy and Systematics?
9. What are the functions of Museums?
SECTION C
(04 X 01 = 4)
This is a case study based question. All are compulsory. In case of internal choice, attempt any one.
Read the paragraph and answer the following questions:
10).There is thousands of different eubacteria or 'true bacteria'. They are characterized by the presence of a
rigid cell wall, and if motile, a flagellum. The cyanobacteria are unicellular, colonial or filamentous,
freshwater/marine or terrestrial algae. The colonies are generally surrounded by gelatinous sheath. They
often form blooms in polluted water bodies. Some of these organisms can fix atmospheric nitrogen in
specialized cells called heterocyst, e.g., Nostoc and Anabaena. Chemosynthetic autotrophic bacteria oxidize
various inorganic substances such as nitrates, nitrites and ammonia and use the released energy for their
ATP production. They play a great role in recycling nutrients like nitrogen, phosphorous. Iron and Sulphur.
(i).which of the following can be termed as ‘Photosynthetic Autotrophs’?
(a) All monerans
(b) Chemosynthetic Bacteria
(c) Archaebacteria
(d) All Eubacteria
(ii).Blue green algae are characterized by_____
(a) They often form blooms in polluted water bodies.
(b) Some of these organisms can fix atmospheric nitrogen.
(c) Their colonies are generally surrounded by gelatinous sheath.
(d) All of these
(iii).Which is incorrect about Heterocyst?
(a) These are specialized cells.
(b) These are present in all Cyanobacteria.
(c) Nostoc and Anabaena have heterocyst.
(d) Organisms having these cells can fix atmospheric nitrogen
(iv).Green plants are similar to Blue green algae in having____.
(a) Chlorophyll a
(b) Heterocysts
(c) Chlorophyll b
(d) None of these.
OR
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(iv). Assertion: In Archaebacteria, the lipids are either linked and are in the form of branched chain.
Reason: Archaebacteria are known to play important role in nutrient cycle.
(a) Both A and R is true and R is the correct explanation of A.
(b) Both A and R is true and R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is False but R is true.
(e) Both A and B are false.
SECTION D
(01 X 05 = 5)
Answer the following question in details. In case of internal choice, attempt any one.
10. (i) Define bacteriophage. Draw a well labeled diagram of Bacteriophage.
(ii) What are the three codes of Nomenclature?
OR
11. (i) What are ‘pearls of the ocean’? What are their deposits?
(ii) What are the characteristics of the virus?
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