Enzymes are made up of:

A. Vitamins
B. Proteins
C. Lipids
D. Carbohydrates

Explanation: Enzymes are proteins that catalyze biochemical reactions.

Which carry oxygen throughout the body?

A. Neutrophils
B. Platelets
C. White blood cells
D. Red blood cells

Explanation: Red blood cells carry oxygen throughout the body.

Plants with thick skins that live in the driest environments are called:

A. Hydrophytes
B. Helophytes
C. Xerophytes
D. Aerophytes

Explanation: Xerophytes are plants adapted to dry environments.

The image of an object is formed on which part of the human eye?

A. Retina
B. Cornea
C. Iris
D. Pupil

Explanation: The image is formed on the retina of the human eye.

Element present in largest amount in human body is:

A. Hydrogen
B. Nitrogen
C. Oxygen
D. Carbon

Which of the following is not vestigial in humans?

A. Appendix
B. Wisdom teeth
C. Nail & eyelid
D. Coccyx

Explanation: Nails and eyelids are not vestigial in humans.

Plants which cannot prepare their food are called?

A. Fungi
B. Algae
C. Moss
D. Ferns

Explanation: Fungi are heterotrophs meaning they cannot make their own food and must obtain nutrients from organic material.

Package of enzymes bounded by a membrane called a

A. Ribosomes
B. Golgi apparatus
C. Endoplasmic reticulum
D. Cytoplasm

Explanation: The Golgi apparatus is a package of enzymes bounded by a membrane and is involved in modifying, sorting, and packaging proteins and lipids for secretion or delivery to other organelles.

Cataract is a disease of which organ?

A. Eye
B. Throat
C. Lungs
D. None of these

Explanation: Cataract is a condition affecting the eye, leading to clouding of the lens.

What is responsible for the communication system of the body?

A. Neurons
B. Nerves
C. Hormones
D. None of these

Explanation: Neurons are responsible for transmitting signals in the nervous system.