old papers-Inter part 1 (2012) biology-Group 2

Old papers

Lahore board

               

Lahore Board (Inter Part - 1) 2012

Subject: Biology                   (Obj. Type)                      Paper-I  
 Total Marks: 17                     Group-1I       Time Allowed: 20 Min . 
 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. Cutting or tilling two or more circles will result in zero mark in that question.

1. The syndrome having trisomy  chromosome number 18 is :           (A) Down's (B) Patau's (C) Edward's (D) Jacob's 
2. Respiratory protein found in all aerobi  species is:                          (A) Cytochrome a (B) Cytochrome b                                         (C) Cytochrome                    (D) Cytochrome 
3. Number of cervical vertebrae in a male camel ( Mammal) :               (A) 7 (B) 11 
4. No definite number Varied with the size of neck Succession starts on dry soil is called                                                           (A) Uydrosere (B) Xerosere (C) Derosere (D) Desertification 
5. Which one is a haploid cell                                                        (A) Oogonia (B) Primary oocyte (C) Secondary oocyte             D) Zygote 
6. Which one is a plant of a desert :                                                      (A) Pinus (B) Dwarf Willow (C) Rose (D) Cactus 
7. Which hormone is chemically a steroid?                                        (A) ADH (B) Cortisone (C) Thyroxine (D) Insulin               
8. Which one of the following isheterotherm                                 (A) Bat (B) Frog (C) Snake (D) Man 9. 
9. Drosophila males for eye colour are                                          (A) Homozygous (B) Heterozygous (C) Hemizygous              (D) None of these 
10. Aspartame is a                                                                                  (A) Dipeptide (B) Tripeptide (C) Pentapeptide (D) Polypeptide  
11. Yellow cytoplasm of ascidian zygote gives rise to                          (A) Muscle cells (B) Gut (C) Neural tube (D) Larval epidermis 
12. Bone to bone attachment is by :                                                       (A) Tendon (R) Nerves (C) Muscles(D)ligament                  
13. Hormone absent in developing seed                                          (A) Auxins (B) Gibberellins (C) Cytokinins (D)Lthene               
14. The hormone promotes closing of stomata .                                    (A) Auxins (B) Gibberellins (C) Abscisic acid (D) Cytokinin 
15.  Amino acid attachment site of  tRNA is                                             (A) G-end (B) 2'-end (C) 3'-end (D) 5'-end 
16.  Disease caused by nutritional deficiency in man                            (A) Cholera (B) Beriberi (C) Arthritis (D) Sugar 17 
17. Incidence of uric acid stone is                                                         (A) 5% (B) 10% (C) 15% (D) 70%

 Lahore Board (Inter Part - I) 2012

Subject: Biology                   ( Sub.type)                  Paper-I           

 Total Marks: 83                     Group-II   Time Allowed:3:10Hrs.      
                                                 SECTION-I

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

1.  Differentiate between ectotherms and endotherms. 
2. What are poikilotherms? Give one example 
3. What are pyrogens 
4. Explain two types of Nastic movement. 
5. Differentiate sclerenchyma from collenchyma cells 
6. What is herniation of disc? 
7. Explain the functions of two hormones secreted by Islets of Langerhans. 
8. What is habituation Give an example. 
9.  Explain Hardy-Weinberg theorem. 
10.  Differentiate between homology and analogy. 
11. Define food chain and food web. 
12.  Explain ecological Niche. 

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

1. What is Parthenocarpy and example? 
2. Give the differences between oviparous and viviparous animals. 
3. What is structure and function of corpus luteum? 
4. What is gastrocoele and from which germ layer it is originated 
5. How do final size of cells of cortex and tracheids is attained in zone of maturation 
6. Give the names of the two sheet like layers into which mesoderm splits and name the cavity formed between these. 
7. What is Alkaptonuria and its cause? 
8. Give the role and kinds of tRNA. 
9. Give the Layering characteristics of Grassland. 
10. Mention the characteristics of plant life in desert ecosystem. 
11. What are solid waste and how these can be used as source of energy?
12. What do you mean by population explosior and give its two causes.

Write short answers to any SIX (6 questions) : 

1. What is mitotic apparatus? Give its function 
2.  Give events of Zygotene. 
3. Give two main importance of meiosis 
4. What is test cross? Give its uses. 
5. What are sex limited traits 
6. Define crossing over. What is it'simportance? 
7. What are palindromic sequences? 
8.  Define genome and genomic library. 
9. What are the uses of PCR amplification and analysis? 

                                        SECTION - II 
Note : Attempt any THREE questions. 
Q:4 
(a) Describe the process of excretion in plants    (4)
(b) Describe how Hershey and Chase prove that DNA is the 
      heredity material.  (4)
Q:5 
(a) Define and explain briefly the fibrous cartilaginous and synoyial joints.  (4)
(b) Define non-disjunction and discuss it's effects with one    example.  (4)
Q:7 
(a) Discuss the nervous system of hydra      (4)
(b) What is incomplete dominance? Explain it with an example. (4)
Q:8 
(a) Explain the process of birth inhuman .    (4)
(b) Discuss green house effect in detail. (4)
Q:9
(a)Define abnormal development. Explair different factors
      causing abnormalities.  (4)
(b) Define hydrospheric ecosystem. Explain some common features of aquatic or hydrospheric ecosystem.                                     (4)