Identify the molecules (a) and (b) shown below and select the right option giving their source and use.
(I)
(II)
Molecule
Source
Use
1.
(II) Heroin
Cannabis sativa
Depressant and slows down body functions
2.
(II) Cannabinoid
Atropa belladonna
Produces hallucination
3.
(I) Morphine
Papaver somniferum
Sedative and painkiller
4.
(I) Cocaine
Erythroxylum coca
Accelerates the transport of dopamine
Molecule
Source
Use
1.
(II) Heroin
Cannabis sativa
Depressant and slows down body functions
2.
(II) Cannabinoid
Atropa belladonna
Produces hallucination
3.
(I) Morphine
Papaver somniferum
Sedative and painkiller
4.
(I) Cocaine
Erythroxylum coca
Accelerates the transport of dopamine
The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents.
| 1. | A - Denaturation at a temperature of about 50ºC |
| 2. | C - Extension in the presence of heat-stable DNA polymerase |
| 3. | A - Annealing with two sets of primers |
| 4. | B - Denaturation at a temperature of about 98ºC separating the two DNA strands |
Identify the likely organisms (a), (b), (c), and (d) in the food web shown below:
|
(a) |
(b) |
(c) |
(d) |
|
|
1. |
Dog |
Squirrel |
Bat |
Deer |
|
2. |
Rat |
Dog |
Tortoise |
Crow |
|
3. |
Squirrel |
Cat |
Rat |
Pigeon |
|
4. |
Deer |
Rabbit |
Frog |
Rat |
Which one of the following pairs of chemical substances, is correctly categorised?
| 1. | Pepsin and prolactin - Two digestive enzymes secreted in the stomach |
| 2. | Troponin and myosin - Complex proteins in striated muscles |
| 3. | Secretin and rhodopsin - Polypeptide hormones |
| 4. | Calcitonin and thymosin - Thyroid hormones |
A fall in glomerular filtration rate (GFR) activates:
1. Adrenal cortex to release aldosterone
2. Adrenal medulla to release adrenaline
3. Posterior pituitary to release vasopressin
4. Juxta glomerular cells, to release renin
What is the function of germ pores?
1. Absorption of water for seed germination
2. Initiation of pollen tube
3. Release of male gametes
4. The emergence of radicle
Which one of the following options gives the correct categorization of six animals according to the type of nitrogenous wastes (A, B, C) they give out?
| A AMMONOTELIC |
B UREOTELIC |
C URICOTELIC |
|
| 1. | Frog, Lizards | Aquatic Amphibia, Humans | Cockroach, Pigeon |
| 2. | Aquatic Amphibia | Frog, humans | Pigeon, Lizards, Cockroach |
| 3. | Aquatic Amphibia | Cockroach, Humans | Frog, Pigeon, Lizards |
| 4. | Pigeon, Humans | Aquatic Amphibia, Lizards | Cockroach, Frog |
Which one of the following sets of items in options 1 – 4 are correctly categorized with one exception in it?
| ITEMS | CATEGORY | EXCEPTION | |
| 1. | Kangaroo, Koala, wombat | Australian marsupials | Wombat |
| 2. | Plasmodium, Cuscuta, Trypanosoma | Protozoan parasites | Cuscuta |
| 3. | Typhoid, Pneumonia, Diphtheria | Bacterial diseases | Diphtheria |
| 4. | UAA, UAG, UGA | Stop codons | UAG |
© 2024 GoodEd Technologies Pvt. Ltd.