Biology
Lahore Board 2015
Inter Part-II Group-I
Time:20 Min.
Objective Type
Marks=17
Note: four possible answer  A,B,C and D to each question are given.The choice which you think is correct,fill that circle in front of that question with marker or pen ink in the answer- book.cutting or filling with two or more cilrcles will result in zero mark in that question.

Q.1

• These have adaptations for reduced rate of transpiration:
  
  (a) xerophytes
  (b) mesophytes
  (c) halophytes
  (d) hydrophytes
  
  
• The incidence of calcium oxalate type stones are:
  
  (a) 40%
  (b) 50%
  (c) 60%
  (d) 70%

• A condition in which palatine processes of maxilla and palatine fail to fuse is:
  
  (a) microcephaly
  (b) cleft palate
  (c) fused palate
  (d) osteoarthritis
  
  
• The Supracoracoid muscles provide power for the
  
  (a) upward stroke
  (b) downward stroke
  (c) recovery stroke
  (d) neutral stroke
  
  
• In humans mid brain is:
  
  (a) reduced
  (b) enlarged
  (c) swollen
  (d) broken
  
  
• Germinating pollen grain is rich source of:
  
  (a) gibberellins
  (b) auxin
  (c) cytokinin
  (d) ethane
  
  
• Fluid secreted by sertoli cells provides liquid medium protection and nourishment to:
  
  (a) oocyte
  (b) sperms
  (c) polar body
  (d) spermatids
  
  
• The removal of apex releases the lateral buds from the apical dominance. It is called:
  
  (a) inhibitory effect
  (b) compensatory effect
  (c) apical dominance
  (d) reproduction
  
  
• X-ray diffraction analysis of DNA was performed by:
  
  (a) Erwin Chargaff
  (b) Watson & Crick
  (c) Rosalind franklin
  (d) Charles darwin
  
  
• Full cell cycle in yeast cells has length of :
  
  (a) 30 minutes
  (b) 60 minutes
  (c) 90 minutes
  (d) 120 minutes
  
  
• Cytoplasm becomes more viscous during;
  
  (a) prophase
  (b) metaphase
  (c) anaphase
  (d) telophase
  
  
• Haemophilia c:
  
  (a) affects both sexes equally
  (b) affects men more than women
  (c) affects women more than men
  (d) in non-alleric recessive sex-linked
  
  
• The two different pieces of DNA joined together is called as :
  
  (a) dimeric DNA
  (b) chimaeric DNA
  (c) trimeric DNA
  (d) Tetrameric DNA
  
  
• In Pakistan among the animals declared extinct is:
  
  (a) white headed deck
  (b) marble teal
  (c) crocodile
  (d) houbara bustard
  
  
• One of the following is an example of predator-prey relationship:
  
  (a) fungus and alga
  (b) flower and insect
  (c) fox and rabbit
  (d) root nodule bacteria
  
  
• The productivity can be indicated by:
  
  (a) consumption of CO₂
  (b) evolution of CO₂
  (c) consumption of O₂
  (d) evolution of O₂
  
  
• Stone cancer is result of :
  
  (a) soil pollution
  (b) water pollution
  (c) air pollution
  (d) stone pollution

Biology
Lahore Board 2015
Inter Part-II
Group-I
Time:3.10 hrs
Essay Type
Marks=83

SECTION-I

2. Write short answers to any EIGHT (8) questions: 16

• Differentiate between shivering thermogenesis and non-shivering thermogenesis.
• Define endotherms and heterotherms.
• What is haemodialysis? Give its importance.
• What is foramen trioseum? How it is formed?
• Define phototactic movements with examples.
• Give composition of exoskeleton in mollusks and arthropods.
• Differentiate between neurula and neurocoel.
• Define primary organizer and primary induction.
• Give four importance of mitosis.
• What is non-disjunction: give its effects.
• How artificial selection is different from matural selection?
• Define Neo Darwinism.

3. Write short answers to any EIGHT (8) questions: 16

• Define reflex arc.
• Differentiate between nerves and ganglia.
• What is the role of anti diuretic hormone?
• What is seed dormancy?
• What is haploid parthenogenesis?
• How identical twins are produced?
• What is recombinant DNA?
• What are transgenic plants?
• Differentiate between alpine and boreal forests.
• What is average rainfall in temperate deciduous forests?
• Differentiate between renewable and non-renewable resources.
• What is deforestation?

4. Write short answers to any SIX (6) questions: 12

• Sketch a phosphodiester bond.
• Define central dogma.
• How can you calculate recombination frequency between two linked genes?
• Explain testicular feminization syndromes.
• What is MODY?
• Explain sex limited traits.
• Define biosphere.
• Sketch three main steps in nitrogen cycle.
• Define food chain.

Section-II

Note: Attempt any THREE questions.

Question#5
(a) Discuss the excretion in planaria. 4
(b) Explain the phenomena of eutrophication. 4

Question#6
(a) Give adetailed note on sliding filament model. 4
(b) Analyze the Darwin’s theory of natural selection as mechanism of evoluition. 4

Question#7
(a) How nerve impulse is passed from one neuron to another neuron? Explain. 4
(b) Define the following terms: 4
(i) Habitat
(ii) Niche
(iii) Food web
(iv) Succession
.
Question#8
(a) Describe female reproductive system in human. 4
(b) Explain the Meselson-stahl experiment. 4

Question#9
(a) What is aging? Describe its causes and symptoms. 4
(b) Describe the phenomenon of gene linkage. 4

Section-III (Practical Part)

Note: Attempt any THREE questions.

A. Draw labelled sketch of urinogenital system of male frog. 5
B. Write procedure to study muscles twitch. 5
C. Write procedure to determine water contents in soil. 5
D. Draw labelled sketch of forelimb of frog skeleton. 5
E. Write the short answers of the following questions: 5

• what is cloaca?
• Name different types of muscles.
• Define food web.
• Give identification of 48 hrs. chick embryo.
• Define histogram.
  

Biology
Lahore Board 2015
Inter Part-II
Group-II
Time:20 Min.
Objective Type
Marks=17
Note: four possible answer  A,B,C and D to each question are given.The choice which you think is correct,fill that circle in front of that question with marker or pen ink in the answer- book.cutting or filling with two or more cilrcles will result in zero mark in that question.

Q.1

• Phragmoplast is formed by vesicles originated from:
  
  (a) endoplasmic reticulum
  (b) golgi complex
  (c) chloroplast
  (d) mitochondria
  
  
• Archaebacteria tolerate temperature upto:
  
  (a) 60°
  (b) 90°
  (c) 120°
  (d) 150°
  
  
• The collenchyma cells have protoplast and usually lack:
  
  (a) primary wall
  (b) secondary wall
  (c) middle lamella
  (d) vacuole
  
  
• The bacteria in the root nodules fix nitrogen and convert it into:
  
  (a) nitrate
  (b) nitrite
  (c) amino acid
  (d) ammonia
  
  
• The unspecialized cells present in flatworms and planaria are:
  
  (a) neoblast
  (b) osteoblast
  (c) osteoclast
  (d) chondrocyte
  
  
• Coniferous forest located at high latitude are called:
  
  (a) alpine
  (b) boreal
  (c) taiga
  (d) prairies
  
  
• The temperature more effective for vernalisation is:
  
  (a) 4°C
  (b) 8°C
  (c) 12°C
  (d) 16°C
  
  
• A network of closed tubule without internal openings is called:
  
  (a) protonephridium
  (b) metanephridium
  (c) nephron
  (d) kidney
  
  
• Human skin colour is controlled by gene pairs:
  
  (a) two to four
  (b) three to six
  (c) four to six
  (d) six to ten
  
  
• Antibody used for the treatment of genital herpes is obtained from:
  
  (a) corn
  (b) soya-bean
  (c) rice
  (d) wheat
  
  
• Which one of the following is initiation codon:
  
  (a) AUG
  (b) GUA
  (c) UGA
  (d) GAC
  
  
• The movements shown by sperms of liverworts towards archegonia is called:
  
  (a) chemotactic
  (b) sleep movement
  (c) nutation
  (d) chemotropism
  
  
• In honey bee males sperm are produced by:
  
  (a) meiosis
  (b) mitosis
  (c) apomixis
  (d) parthenocarpy
  
  
• The sensation of pain is produced by:
  
  (a) chemoreceptors
  (b) mechanoreceptors
  (c) photoreceptors
  (d) nociceptors
  
  
• The microtubule is composed of traces of RNA and protein called:
  
  (a) myosin
  (b) troponin
  (c) actin
  (d) tubulin
  
  
• The study of human population and things that affect them is called:
  
  (a) demography
  (b) gerenotology
  (c) aging
  (d) evolution
  
  
• Which one of the following is excretophore:
  
  (a) stem
  (b) leaves
  (c) roots
  (d) bark

Biology
Lahore Board 2015
Inter Part-II
Group-II
Time:3.10 hrs
Essay Type
Marks=83

Section-I

2. Write short answers to any EIGHT (8) questions: 16

• Give four adaptations of xerophytes.
• Differentiate between osmoconforners and osmoregulators.
• Write structural formulas of urea and uric acid.
• Differentiate between fibers and sclereides.
• Define chemotactic movement. Write its cause.
• What is rickets? Give its treatment.
• Define apical and intercalary meristems.
• What is blastoderm? Name its layers.
• Describe cell cycle. Give its two phases.
• How cytokinesis occurs in animals and plants.
• Explain homologous and analogous organs.
• Define Hardy Weinberg theorem. Give its formula.

3. Write short answers to any EIGHT (8) questions: 16

• What is saltatory impulse?
• What is action of nicotin on coordination?
• What is cretinism?
• Describe gonorrhea.
• What are fraternal twins?
• What are advantages of cloning?
• What are palindromic sequences?
• What is Taq Polymerase?
• Give characteristics of profundal zone.
• Where is desert ecosystem located in Pakistan?
• Give the sources and harmful effects of chloroflorocarbons (CFCs) .
• What is eutrophication?

4. Write short answers to any Six (6) questions: 12

• What is semi-conservative replication?
• Name types of RNA.
• Differentiate between transcription and translation.
• What is law of segregation?
• What are multiple alleles? Give one example.
• Differentiate between linkage and linkage group.
• What is a food chain? Give example.
• Differentiate between hydrosere and xerosere.
• What is commensalisms? Give one example.

Section-II

Note: Attempt any THREE questions.

Question#5
(a) Describe osmoregulation in animals. 4
(b) Define pollution. Describe the causes and affects of water pollution. 4

Question#6
(a) Describe the significance of secondary growth. 4
(b) Describe the inheritance of acquired characteristics. 4

Question#7
(a) Write note on nitrogen cycle. 4
(b) Write note on adrenal gland. 4

Question#8
(a) Compare the asexual reproduction with sexual reproduction. 4
(b) How did Meselson and Stahl prove the semi-conservative method of DNA replication? 4

Question#9
(a) Discuss the external factors affecting growth in plants. 4
(b) Explain XO – XX and ZZ – ZW types of sex determination. 4

SECTION-III (Practical Part)

Note: Attempt any THREE questions.

A. Sketch and label the nervous system of cockroach. 5
B. Draw and label the pelvic girdle of frog. 5
C. Write down the procedure of muscle twitch using frog’s muscle. 5
D. Write down the procedure to determine the water content of giving soil sample. 5
E. Write the short answers of the following questions: 5

• What is food chain?
• Enlist types of tropisms.
• What is humus?
• Give the niche of a bird.
• Name the human traits controlled by a single gene pair.