Lahore Board 2017
Inter (Part-II)
Biology
Group-1 PAPER: II
Time: 20 Minutes
(OBJECTIVE TYPE) Marks: 17
Note: Four possible answers 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 two or more circles result in zero mark in that question.

• Which one of the following structures of kidney is Involved in the production of concentrated urine:

1. Glomerulus
2. Juxtamedullary nephron
3. Cortical nephron
4. Vasa recta

• The body temperature regulation in human is based on complex homeostatic thermostat present in the:

1. Cerebrum
2. Medulla oblongata
3. Hypothalamus
4. Thalamus

• Collagen fibers of bone are hardened by the deposit of:

1. Calcium phosphate
2. Sodium phosphate
3. Sodium carbonate
4. Calcium carbonate

• The synovial joint is surrounded by a layer of connective tissue called:

1. Ligament
2. Nucleus pulposus
3. Annulus fibroses
4. Fibrous capsule

• The onset of epilepsy usually occurs before the age of :

1. 25 years
2. 50 years
3. 30 years
4. 35 years

• All of the following animals are the haploid parthenogenetic except:

1. Wasps
2. Aphids
3. Honey bees
4. Ants

• Uterus opens into the vestibule (vagina) through:

1. Cervix
2. Ureter
3. Oviduct
4. Uterine tube

• Vitamins are the organic compounds synthesized within the plant bodies in the presence of:

1. Water
2. Nutrients
3. Light
4. Oxygen

• DNA polymerase only adds nucleotides to the end:

1. 5’- end
2. 3’- end
3. 2’- end
4. 4’- end

• The presence of invading cells other than normal tissue is an indication of:

1. Melatoma
2. Abnormality
3. Mutation
4. Malignancy

• The condensation of chromosomes reaches to its maximum during:

1. Diakinesis
2. Pachytene
3. Zygotene
4. Leptotene

• The individual called universal recipient has:

1. B-blood group
2. O-blood group
3. AB-blood group
4. A-blood group

• Patients of cystic fibrosis often die due to numerous infections of the:

1. Respiratory tract
2. Excretory tract
3. Digestive tract
4. Reproductive tract

• Emigration and immigration of members of a population, cause disturbance in the:

1. Genotype
2. Genetic drift
3. Phenotype
4. Gene pool

• Succession begins by a few hardy invaders, called:

1. Initiators
2. Pioneers
3. Founders
4. Creators

• The soil of grass-land is basically impermeable with excessive:

1. Neutral pH
2. Acidity
3. Salinity
4. Moisture

• Our daily energy requirement met by fossil fuels is:

1. 95%
2. 75%
3. 80%
4. 85%

Lahore Board 2017
Inter (Part-II)
Biology
Group-I
PAPER: II
Time: 2:40 Hours
(SUBJECTIVE TYPE)
Marks: 68
SECTION-I

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

1. Give the characteristics of xerophytic plants.
2. What is counter current multiplier?
3. State renal failure.
4. Compare phototropism and geotropism.
5. What is plantigrade? Also give examples.
6. Differentiate between ligaments and tendons.
7. What are test tube babies?
8. Give some advantages and disadvantages of cloning.
9. Write a note on profundal zone.
10. What is layering in ecosystem?
11. Mention any four ways in which we can save energy.
12. Give the importance of ozone layer.

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

1. How plants respond to various stimulu?
2. Differentiate between etiolation and chlorosis.
3. Give commercial applications of auxins.
4. How sex determination occurs in yeast?
5. Describe sex influenced traits.
6. What is Bombay phenotype?
7. Define the term totiplten.
8. Compare ex-vivo gene therapy with in-vivo gene therapy.
9. Elaborate the uses of plasmids.
10. How primary succession differs from secondary succession?
11. Define hydrosere and xerosere.
12. Write down the significance of root nodules in plants.

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

1. Define growth.
2. What do you mean by lateral meristem?
3. Define one-gene one polypeptide hypothesis.
4. What do you mean by mutations?
5. Define nucleotide and nucleoside.
6. Define meiosis and mitosis
7. What do you mean by non-disjunction?
8. Define theory of special creation. Who proposed it?
9. What do you mean by non-random mating?

SECTION-II

Q. 5. (a) Give four major homeostatic functions of liver.
(b) What is succession? Describe process of succession on a dry soil.

Q.6. (a) Give importance of skeleton.
(b) Describe types of chromosomes on the basis of centromere.

Q.6. (a) Give importance of skeleton.
(b) Describe types of chromosomes on the basis of centromere.

Q.7. (a) Explain the structure and function of thyroid gland.
(b) What is pollution? Explain the phenomenon of air pollution.

Q.8. (a) Explain sexually transmitted diseases in human.
(b) Explain in detail diabetes mellitus and its types.

Q.9. (a) Describe the role of nucleus in development
(b) Describe the factors affecting gene frequency of a population.

Lahore Board 2017
Inter (Part-II)
Biology
Group-II
PAPER: II
Time: 20 Minutes
(OBJECTIVE TYPE)
Marks:17
Note: Four possible answers A,B,C and D to each question are giver. 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 tow or more circles will result in zero mark in that question.

• The affected individuals have one missing X-chromosome with only 45 chromosomes in:

1. Down’s syndrome
2. Sach’s syndrome
3. Turner’s syndrome
4. Klinefelter’s syndrome

• Ozone molecule is made up by binding of three atoms of:

1. Carbon
2. Oxygen
3. Nitrogen
4. Hydrogen

• All the alternative forms of a gene, whose number is more than two are called:

1. Polygene
2. Multiple alleles
3. Manifold alleles
4. Allelomorphs

• In juxtamedullary nephrons, additional capillaries extend down to form a:

1. Vasa efferentia
2. Vasa deferentia
3. Vasa recta
4. Vasa hecta

• The chromosomes become visible, shorten and thick in:

1. Zygotene
2. Leptotene
3. Pachytene
4. Diplotene

• Anything which interferes with the normal process of development is the factor causing:

1. Aging
2. Regeneration
3. Normalites
4. Abnormalities

• Both bones and cartilage consist of living cells embedded in the matrix of protein known as:

1. Collagen
2. Keratin
3. Insulin
4. Fibrinogen

• The rate of primary production is about 700-1500 gm/ m²annually in:

1. Tundra
2. Tropical grassland
3. Temperate grassland
4. Desert

• The actual lacation of plate where an organism lives, called:

1. Niche
2. Abode
3. Terrain
4. Habitat

• All the changes of moulting are controlled by the nervous system and a hormone:

1. Serotonin
2. Epinephrine
3. Ecdysone
4. Melanin

• The ultimate source of all changes is:

1. Mutation
2. Evolution
3. Migration
4. Genetic drift

• From beginning of the third month of pregnancy, the human’s embryo is called:

1. Kitten
2. Kid
3. Cub
4. Foetus

• Each Okazaki fragment is synthesized by:

1. DNA polymerase I
2. DNA polymerase II
3. DNA polymerase III
4. DNA polymerase IV

• Hemodialysis means:

1. Removing the blood
2. Clearing the blood
3. Diluting the blood
4. Storing the blood

• Alzheimer’s disease is characterized by the decline in the functions of:

1. Liver
2. Brain
3. Kidney
4. Stomach

• Enzyme thermos aquaticus is commonly known as:

1. DNA polymerase
2. RNA polymerase
3. Taq ligase
4. Taq polymerase

• Corpus luteum starts secreting a hormone known as:

1. Progesterone
2. Oxytocin
3. Testosterone
4. Oestrogen

Lahore Board 2017
Inter (Part-II)
Biology
Group-II
PAPER: II
Time: 2:40 Hours
(SUBJECTIVE TYPE)
Marks: 68
SECTION-I

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

1. Enumerate four adaptations of xerophytes in terrestrial habitat.
2. Differentiate between osmoregulation and thermoregulation.
3. What are pyrogens? Give their function.
4. Differentiate between epinasty and hyponasty
5. What is foramen triosseum? Give its function.
6. What is rigor mortis? Give its cause.
7. Define parthenocarpy. Give its example.
8. What is corpus luteum? Give its function.
9. Define profundal zone. Name living organisms found in it.
10. What is tundra? Where is it found in Pakistan?
11. Define eutroplication. Give its impact.
12. Differentiate between afforestation and reforestation.

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

1. What is epilepsy?
2. Give commercial application of Gibberellins.
3. Define imprinting
4. State Mendel’s Law of Independent Assortment.
5. What is test cross? Give its importance.
6. Differentiate between autosomes and sex chromosomes.
7. What is genomic library?
8. Difine transgenic organisms.
9. Give two advantages of PCR.
10. Differentiate between habitat and niche.
11. What is mutualism? Give example.
12. Define synecology and autecology.

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

1. Differentiate between rough and smooth type of bacteria.
2. How many DNA polymerases are found? Write down their names.
3. What are the contributions of P.A. Levene for determining the structure of DNA?
4. Differentiate between apical meristems and lateral meristems.
5. What is the difference between epiblast and hypoblast?
6. Write down the functions of mitotic apparatus.
7. What is a Turner’s syndrome? Write briefly.
8. Define endangered species with special reference Pakistan.
9. How molecular biology be used as an evidence evolution?

SECTION-II

Q.5.(a) Describe thermoregulation in mammals.
(b) Explain food web and its trophic levels.

Q.6.(a) What are joints? Explain various types of joints.
(b) Prove that DNA is the hereditary material.

Q.7. (a) Explain feed-back mechanism. Give an example.
(b) Discuss importance of forests.

Q.8. (a) Describe the human female reproductive cycle.
(b) Describe the Law of Independent Assortment with an example

Q.9. (a) What is aging? How will you explain this process?
(b) How did eukaryotes evole from prokaryotes?