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