BALOCHISTAN PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION 2021
FOR RECRUITMENT TO THE POSTS OF
ASSISTANT COMMISSIONER/SECTION OFFICER (B-17)
IN THE SERVICES & GENERAL ADMINISTRATION DEPARTMENT
ZOOLOGY
Total Marks: 100 July 06, 2021 Time Allowed: 03 Hours
NOTE: 1 Attempt Five questions in all. Q. No. 1 is COMPULSORY. Attempt at least one question from each section.
Draw neat and labelled diagrams where necessary.
ii All the parts (if any) of each Question must be attempted at one place instead of at different places.
iii Candidate must write Q. No. in the Answer Book in accordance with Q. No. in the Q. Paper.
iv No Page/Space be left blank between the answers. All the blank pages of the Answer Book must be crossed.
v Extra attempt of any question or any part of the attempted question will not be considered.
Q No. 1 a) Differentiate between the following (any seven) (2×7)
i) Metamerism and Segmentation
ii) Prototheria and Metatheria
iii) Ascon and sycon type of sponges
iv) Polyp and medusa
v) Chondrichthyes and osteichthyes
vi) Autotrophs and heterotrophs
vii) Food chain and food web
viii) Protostomes and deuterostomes
ix) Microtubules and microfilaments
x) Aneuploidy and Euploidyb) Choose the best option (1×10)
i All of the following are storage polysaccharides except:
a) Cellulose b) Starch c) Glycogen d) Dextran
ii The vertebrate lungs are derived from
a) Ectoderm b) Mesoderm c) Endoderm d) Notochord
iii A DNA codon consists of:
a) One nucleotide b) Three nucleotides c) Hundreds or even thousands of nucleotides
iv Limbless members of class reptilia belong to the order:
a) Testudines b) Squamata c) Rhynchocephalia d) Archosauria
v Amphibians arose from:
a) Cartilagenous fish b) Jawless fish c) Ray finned fish d) Bony fishes with lungs
vi Which of the following is not sub phylum of Chordata:
a) Hemichordata b) Urochordata c) Cephalochordata d) Vertebrata
vii In annelids, the clitellum is:
a) Part of reproductive system b) Usually near the head
c) Stores the fertilized eggs d) Glandular and secretes mucus
viii Archaeopteryx was a connecting link, carried the characters of:
a) Reptile and bird b) Reptile and mammal c) Fish and amphibian d) Amphibian and reptile
ix Odd toed ungulates such as horse, zebra, donkey etc. are included under order:
a) Proboscidea b) Ruminants c) Perissodactyla d) Artiodactyla
x Which of the following organelles always contain DNA:
a) Lysosome b) Golgi complex c) Mitochondria d) Ribosome
c) Sketch and label the structure/diagram of the following (any three) (2×3)
i) β-Glucose
ii) Amino acid
iii) Purine nucleotide
iv) Planula larva
v) Energy yielding phase of glycolysis