GUJRANWALA BOARD 2017
(Objective Type)
Biology
Time Allowed: 20 Minutes
Maximum Marks: 17
NOTE: You have four choice for each objective type question as A. B. C and D. The choice which you think is correct, fill that circle in front of that question number. Use marker or pen to fill the circle. Cutting or filling two or more circles will result in zero mark in that question. Attempt as many questions as given in objective type questions papers and leave others blank. No credit will be awarded in case. BUBBLE are not filled. Do not solve questions on this sheet of OBJECTIVE PAPER.

• Urea is produced in

1. lungs
2. liver
3. kidney
4. pancreas

• Arginase splits the arginine to form urea and

1. ornithine
2. citruline 
3. creatinine
4. ammonia

• Skeletal muscle fibres have diameter

1. 100-200 μm
2. 10-100 μm
3. 10-100 μm
4. 100-1000 μm

•  Tetanus is caused by

1. bacteria
2. Virus
3. fungi
4. protist

• The structure of human brain that control sleep-wake cycle is

1. amygdala
2. hippocampus
3. thalamus
4. hypothalamus

• Diploid parthenogenesis occurs in

1. wasp
2. ant
3. aphid
4. bee

• Sertoli cells are cells of

1. testis
2. ovaries
3. urethra
4. kidney

• Grey vegetal cytoplasm gives rise to

1. larval epidermis
2. notochord
3. muscle cells
4. gut

• The number of chromosomes in mosquito is

1. 32
2. 20
3. 6
4. 26

• The duration of mitosis in human cell cycle is

1. 30 hour
2. 30 sec
3. 30 days
4. 30 mint

• The frequency of occurrence of down syndrome is

1. 1/700
2. 1/40
3. 1/500
4. 1/200

• The form of appearance of the trait is called

1. genotype
2. karyotype
3. phenotype
4. homozygous

• A full set of genes of an individual is

1. gene pool
2. genome
3. genomic library
4. recombinant DNA

• Change in frequency of alleles at a locus that occurs by chance is called

1. genetic drift
2. mutation
3. migration
4. non-random mating

• The annual productivity of a temperate grassland ecosystem is

1. 1700 g/m²
2. 200 g/m²
3. 700-1500 g/m²
4. 2000 g/m²

• The %age of CO₂ in air is

1. 79%
2. 0.03%
3. 20%
4. traces

• All the food chains and food webs begin with

1. producer
2. primary consumers
3. secondary consumers
4. decomposers

GUJRANWALA BOARD 2017
INTER PART II
(Subjective Type)
Group-I
Time 2.40 Hours
Maximum Marks: 68

1. Compare hypertonic environment and hypotonic environment.
2. What is hypercalcemia, write its effects?
3. Differentiate between protonephridium and meta-nephridium.
4. Which kind of cells are responsible for bone formation-write their function?
5. Why does moulting take place in arthropods?
6. What is difference between axial skeleton and appendicular skeleton?
7.  Define placenta. Give its function.
8.  What are advantages of cloning?
9.  Differentiate between weather and climate.
10.  What is the difference between Thar and Thal?
11.  How chlorine is responsible for ozone depletion?
12. How exhaustible resources are different from inexhaustible resources? 10.  How does metamorphosis occur in arthropoda?

3. Write short answers to any EIGHT questions.

1. Enlist the hormones secreted by posterior lobe of pituitary gland.
2. Compare sympathetic with parasympathetic nervous system.
3. Define biorhythms and give their types.
4. What is probability and product rule?
5. How genotype differs from phenotype?
6.  State law of independent assortment.
7. Discuss role of a particular probe.
8.  Describe the term "gene pharming".
9. Why biotechnology is important for human beings?
10.  How biogeochemical cycles maintain the fertility of soil?
11. What do you understand by the term "trophic level"?
12. Enumerate the symbiotic associations.

4. Write short answers to any SIX questions.

1. Differentiate between area of pellucida and area of opaca
2. Define gray crescent. What role, it plays in development?
3.  What is an Okazaki fragment? How is it synthesized?
4.  Differentiate between codon and anticodon.
5.  Briefly describe alkaptonuria disease.
6.  Enlist four important functions of mitosis.
7.  What are the main features of metaphase-I of meiosis?
8. Name any four species, declared extinct in Pakistan.
9.  Define natural selection and artificial selection.

SECTION-II

NOTE: - Attempt any three questions.

Q5.
(a) Give an account of excretion in plants.
(b) Define ecosystem. Explain its various biotic components.

Q6.
(a) Describe the structure of a skeletal muscle fibre.
(b) Discuss the process of transcription.

Q7.
(a) Describe the functions of "abscisic acid" growth hormone in plants.
(b) Discuss the importance of forests

Q8.
(a) Describe four sexually transmitted diseases.
(b) Define test cross. Explain it with example.

Q9.
(a) Define and explain growth correlations.
(b) Discuss about "The Endangered Species".