ETA MDCAT POINT MCQs

Stool sample

Name:Grasshopper

Name:
Caelifera (suborder); typical species may include Schistocerca gregaria (Desert Locust) for pest types.

:

Grasshoppers are herbivorous insects known for their powerful hind legs adapted for jumping. They are common in grasslands and agricultural fields and can become serious pests when present in large numbers, as they feed on a wide range of crops.

:

Grasshoppers thrive in warm, dry climates and are commonly found in:
Grasslands
Farmlands
Meadows
Semi-arid regions

(of damage):

Grasshoppers feed on the foliage, stems, and sometimes even the fruit of plants. In swarms, they can cause severe defoliation and crop loss.

Symptoms (of infestation):

Irregular holes in leaves

Skeletonized leaves

Stunted plant growth

Presence of grasshoppers on crops

Sudden large-scale crop damage

:

Chemical Control: Use of insecticides like Malathion or Carbaryl under recommended guidelines.

Biological Control: Use of natural predators (e.g., birds, spiders) or pathogens like Metarhizium anisopliae.

Mechanical Control: Trapping or hand-picking in small infestations.

:

Regular field monitoring

Maintaining field hygiene

Crop rotation and intercropping

Early sowing to avoid peak grasshopper season

Cycle:

1. Egg: Laid in soil in pods during late summer.

2. Nymph (hopper): Resemble small adults but wingless; undergo multiple molts.

3. Adult: Fully developed wings, capable of flying and reproducing.

Lifecycle completes in 40–60 days depending on species and environmental conditions.

If you want details? Ask in the comments section.

Gram stain.

. Bedbug

. Cimex lectularius.

I will explain a short introduction.
Cause
Symptoms
Treatment
etc.



Bed bugs are small, parasitic insects that feed on the blood of humans and animals. They are nocturnal and tend to hide in mattresses, furniture, cracks, and crevices during the day. Although not known to transmit diseases, their bites can cause discomfort, allergic reactions, and psychological stress.
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Infestation typically occurs due to:
Traveling and carrying bugs from infested hotels or places.
Second-hand furniture or clothing.
Proximity to infested areas, especially in apartment buildings.
Lack of cleanliness or clutter that provides hiding spots.
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Bed bugs prefer warm environments close to humans and are commonly found in:
Mattresses and bed frames
Furniture (especially upholstered items)
Cracks in walls or floors
Behind wallpapers, electrical switchboards, picture frames
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Name

Cimex lectularius (common bed bug)
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Red, itchy bite marks, often in a line or cluster
Allergic reactions in some individuals
Blood stains or dark f***l spots on sheets ormattresses
A musty, sweet odor in heavily infested areas
Difficulty sleeping or anxiety due to infestation
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Chemical Treatment: Insecticides like pyrethroids, neonicotinoids.
Non-chemical Methods: Heat treatments, vacuuming, steam cleaning, and encasing mattresses.
Professional Pest Control: Best for severe infestations.
Topical treatment for bites: Antihistamines, corticosteroid creams, or antiseptics to relieve itching and prevent infection.
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Inspect luggage and clothing after traveling.

Avoid bringing in second-hand furniture without thorough inspection.
Use protective mattress covers.
Maintain cleanliness and reduce clutter.
Regularly inspect common hiding spots.
Seal cracks and crevices.
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Cycle

Bed bugs undergo incomplete metamorphosis, with the following stages:
1. Egg – Small, white, sticky eggs laid in hidden areas.
2. Nymph – Passes through 5 instars (stages), feeding on blood at each stage.
3. Adult – Oval, reddish-brown, and 5-7 mm long. Can live several months and lay hundreds of eggs in a lifetime.
Each stage requires a blood meal to molt. Under optimal conditions, the life cycle from egg to adult takes about 5-6 weeks.

The most abundant organic molecules in the cell?
Protein. Water
Carbohydrates. none

Different between solubility and hydrolysis?

The most abundant compound in the cell?
Water protein
Lipid. All

The most abundant compound in nature?
Protein. Lipid
DNA none of the above