BIOLOGY
(OBJECTIVE)
PAPER(II)
TIME ALLOWED:- 20 MINUTES
PAPER CODE 4461
MAXIMUM MARKS:-17
NOTE:- you have four choices for each objective type question as A,B,C and D. the choice that you think is correct , fill the circle in front of the question number. Use marker or pen to fill the circles. Cutting or filling two or more circles will result in zero mark in that question. attempt as many questions as given in objective type question paper and leave others blank. write the letter A,B,C or Din the column against each question. If there is a contradiction in the bubble and hand written answer, bubble option will be considered correct.

Question#1

• The high level of renal failure is also called
  
  (A) Death
  (B) Uremia
  (C) Anemia
  (D) Sciatica
  
  
• Sharks excrete nitrogenous waistes in the form of
  
  (A) Ammonia
  (B) Uric acid
  (C) Urea
  (D) Allantain
  
  
• The membrane that bounds vacuole is called
  
  (A) Tonoplast
  (B) Protoplast
  (C) Chloroplast
  (D) Leucoplast
  
  
• The hyphae of fungi show movements
  
  (A) Thigmotropism
  (B) Chemotropism
  (C) Hydrotropism
  (D) Geotropism
  
  
• The largest part of brain is
  
  (A) Cerebellum
  (B) Medulla
  (C) Thalamus
  (D) Cerebrum
  
  
• the main neuro transmitter for synopsis that lies out side control nervous system is
  
  (A) Scrotine
  (B) Acetyle choline
  (C) Dopamine
  (D) Adrenaline
  
  
• in honey bee male sperm are produced by
  
  (A) Mitosis
  (B) Meiosis
  (C) Parthenogenesis
  (D) Binary fission
  
  
• during delivery in human the average loss of blood is about
  
  (A) 150cm³
  (B) 250cm³
  (C) 350cm³
  (D) 450cm³
  
  
• the light that enhances cell division but retard cell enlargement
  
  (A) Blue light
  (B) Red light
  (C) Green light
  (D) Yellow light
  
  
• in sickle cell anemia a point mutation leads to the change of amino acid i.e glutamic acid in to
  
  (A) Arginine
  (B) Lysine
  (C) Valine
  (D) Alanine
  
  
• the microtubules are composed of a protein tubulin and traces of
  
  (A) DNA
  (B) NAD
  (C) FAD
  (D) RNA
  
  
• human skin colour is controlled by gene pairs
  
  (A) Two to four
  (B) Three to six
  (C) Four to six
  (D) Seven to eight
  
  
• P^SC₁₀₁ has antibiotic resistence gene for
  
  (A) Tetracycline
  (B) Ampicillin
  (C) Neomycin
  (D) Ergotine
  
  
• the ultimate source of all changes is
  
  (A) Evolution
  (B) Mutation
  (C) Genetic drift
  (D) Migration
  
  
• the relationship between insects and the flowering plants is an example of
  
  (A) Parasitism
  (B) Predation
  (C) Mutualism
  (D) Commensalism
  
  
• coniferous forest located at high altitude are
  
  (A) Alpine
  (B) Boreal
  (C) Taiga
  (D) Arctic
  
  
• a chemical that kills weed in a crop is called
  
  (A) Pesticide
  (B) Insecticide
  (C) Fungicide
  (D) Herbicide

BIOLOGY
(SUBJECTIVE)
PAPER(II)
TIME ALLOWED:2.40 HOURS
MAXIMUM MARKS 68
SECTION……I

2. ATTEMPT ANY EIGHT QUESTIONS. 8X2=16

• Give four adaptation of merine fish for its survival.
• What are juxtamedullary nephrens? what is their role.
• Define counter current multiplier.
• Define phototectic movement and photo nastic movement.
• Give two modifications in the exoskeleton of orthropods.
• Name the bones of pelvic girdle.
• Define neurotransmitters and give its two examples.
• Define limbic system? Give its two functions.
• Define acromegoly? give its cause.
• What is the role of interstitial cells in sperm production?
• Differentiate between oestrous cycle and menstrual cycle.
• Name the hormones that stimulate mammary glands for lactation.

3. ATTEMPT ANY EIGHT QUESTIONS. 8X2=16

• What do you know about erythro blastosis foetalis?
• Define poly genes and explain briefly their function.
• Differentiate between protonopia and diuteranopia.
• Write a note on theory of special creation.
• Give two contributions of cuvier. 
• What are hydrothermal vents?
• Discuss role of decomposers in ecosystem.
• State parasitism with example.
• What are biogeochemical cycles?
• How does renewal resources differ from nonrenewable resources?
• Explain briefly nutrient cycle in nature.
• Write a note on eutrophication.

4. Attempt any six questions. 6x2=12

• What is regeneration? Give one example.
• Define embryonic induction.
• Draw structural formulae guanine.
• What is nucleosome?
• How many chromosomes are present in sugarcane and mosquito.
• Differentiate between necrosis and apoptosis.
• What is gene-pharming.
• Characterize profundal zone of fresh water lakes.
• What is the effect of human impact on desert ecosystem.

SECTION………..II

NOTE:ATTEMPT ANY THREE QUESTIONS. 8X3=24
Question#5
(a) Describe sliding filament model of muscle contraction.
(b) Explain any two evidences in favour of evolution.

Question#6
(a) Explain the structure of nephron.
(b) Discuss epistasis and pleiotropy.

Question#7
(a) Compare asexual reproduction with sexual reproduction.
(b) Explain green house effect.

Question#8
(a) Compare the nervous system of hydra with planeria.
(b) Describe about down syndrome.

Question#9
(a) How did mesclson and stahl proove that DNA replication is semi conservative?
(b) Write note on grazing