Biological issues

07/08/2023

07/08/2023

Salim Habib Education complex, Jhang Road, Toba Tek Singh

31/07/2023

Pepsinogen is converted to active pepsin by
A. Active secretin
B. HCl
C. Active pepsin
D. Both b & c
E. Gastrin

31/07/2023

Collenchyma is a supporting tissue in
A. Seeds
B. Seedlings
C. Shrubs
D. Trees

31/07/2023

1. Guard cells are the only cells of epidermis which have
A. Vacuole
B. Chloroplst
C. Cytoplasm
D. Leukoplast
2. Which of the following is the closest to the centre of a woody stem
A. Vascular cambium
B young xylem
C old phloem
D. Old xylem

30/07/2023

Fatty acids and glycerol are first absorbed by
A. Lymph vessels
B. Villi
C. Blood capillaries
D. Hepatic portal vein

30/07/2023

If bile is not produced, ........ will be left undigested
A. Fats
B. Proteins
C. Carbohydrates
D. Sucrose

26/07/2023

Poliomyelitis affects
A. Motor neuron
B. Sensory neuron
D. Brain
D. Muscles

26/07/2023

HIV attahes to
A. CD4 protein
B. Nucleoprotein
C. Lipoprotein
D. Glycoprotein

26/07/2023

HIV primarily infects
A. Plasma membrane
B. Helper T cells
C. White blood cells
D. Red blood cells

21/04/2023

When mother's anti - Rh negative antibodies seep through placenta into blood circulation of foetus they start __________ of RBC of foetus
A. Plasmolysis
B. Crenation
C. Haemolysis
D. Demoplasmolysis

19/04/2023

The process by which a tissue causes another tissue to differentiate is called
A. Gastrulation
B. Metamorphosis
C. Cleavage
D. Induction

16/04/2023

Mendels law of inheritance can be demonstrated by
A. Test cross
B. Back cross
C. Monohybrid cross
D. Dihybrid cross

31/03/2023

Which of the following is not a component of reflex arc
A. Afferent nerve
B. Efferent nerve
C. Brain
D. Effectors

29/03/2023

DNA finger printing cannot apply on
A. S***m cell
B. Skin cell
C. RBCs
D. Hepatic cell

29/03/2023

Thermus aquaticus naturally lives in
A. Glaciers
B. Hot springs
C. Deep sea waters
D. Rocky mountains

26/03/2023

Which of the following is not a tropic hormone
A. TSH
B. ACTH
C. GH
D. ADH

18/03/2023

Which of the following disease is odd one
A. Parkinson
B. Alzheimer
C. Epilepsy
D. Graves

10/03/2023

All are target site for oxytocin except
A. Myometrium
B. Breast
C. O***y
D. Uterus

10/03/2023

Most portion of pancreas acts as
A. Endocrine
B. Exocrine
C. Mesocrine
D. Autocrine

07/03/2023

During mammalian ovulation, egg is released into
A. Body cavity
B. Uterus
C. Fallopian tube
D. Graffian follicle

07/03/2023

Division of germinal epithelium directly produces
A. S***matids
B. S***ms
C. S***matophyte
D. S***matogonia

22/02/2023

Pyrogens are produced by
A. Bacteria
B. Virus
C. White blood cells
D. Both a and b
E. All of these

21/02/2023

Rapid melting of ice is due to
A. Greenhouse effect
B. Ozone layer depletion
C. Acid rain
D. All of these

19/02/2023

Which of the following is not Ectotherm
A. Crow
B. Lizzard
C. Toad
D. Fish

18/02/2023

When pH of blood is increased than normal value, nephron responds by
A. H ion secretion is increased
B. HCO3 ions secretion decreased
C. Na ion is suppressed
D. H ion secretion is suppressed

18/02/2023

Percentage of nitrogen in inspired air is approximately
A. 79%
B. 21%
C. 00%
D. 04%

15/02/2023

Which of these are the first and last elements in spinal reflex
A. Axon and dendrite
B. Sence organ and muscle effector
C. Ventral horn and dorsal horn
D. Motor neuron and sensory neuron

13/02/2023

Relationship between honey bee and flower is called
A. Parasitism
B. Mutualism
C. Commensalism
D. Lichens

12/02/2023

Water molecule splits during photosynthesis
A. Interior space of thylakoid
B. Outside thylakoid
C. Into stroma
D. At ATP synthase Complex