Biology · Chemistry

Biomolecules and Enzymes

1,501 Questions

This topic focuses on biomolecules, specifically proteins, enzymes, and amino acids. It includes questions on enzyme structures, protein folding, and catalysis. These concepts are crucial for medical and biology competitive exams.

Enzyme catalysisProtein structuresAmino acid synthesisPolypeptide chainsBiomolecule properties

Biomolecules and Enzymes Questions

Multiple choice

This protein contains 9 essential amino acids

  1. incomplete

  2. complete

  3. complementing

  4. complate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A complete protein contains all nine essential amino acids that the human body cannot synthesize on its own and must obtain from the diet. Incomplete proteins lack one or more of these essential amino acids.

Multiple choice

When two incomplete proteins are paired together and share the missing amino acids

  1. complete protein

  2. incomplete protein

  3. complementing protein

  4. totally awesome protein
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Complementing proteins (or complementary proteins) are two or more incomplete protein sources that, when eaten together, compensate for each other's lack of specific essential amino acids to provide a complete protein profile.

Multiple choice

The building blocks of proteins

  1. amino acids

  2. fatty acids

  3. monosaccharides

  4. water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Proteins are polymers made up of long chains of monomeric units called amino acids. Fatty acids are building blocks of lipids, and monosaccharides are building blocks of carbohydrates.

Multiple choice

Ribosomes produce proteins.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ribosomes are the cellular structures responsible for protein synthesis, translating messenger RNA (mRNA) into polypeptide chains.

Multiple choice

Certain _________ are essential for growth and maintenance of cells

  1. Amino Acids

  2. Palatable

  3. Ruminents

  4. Omnivore
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Amino acids are the building blocks of proteins, and certain essential amino acids must be supplied in the diet because the body cannot synthesize them. These compounds are vital for cellular repair, growth, and enzyme production.

Multiple choice

how the body uses the nutrients in a diet or ration to sustain life 

  1. Rumen

  2. Nutrient

  3. Nutrition

  4. Balanced Ration
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nutrition is the biological process by which organisms assimilate and utilize food for maintenance, growth, and reproduction. A nutrient is a specific chemical substance within food, while a balanced ration is the daily feed allowance containing all necessary nutrients in correct proportions.

Multiple choice

What is made up of amino acids?

  1. Protein

  2. Carbohydrates

  3. Feed

  4. Rations
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Proteins are complex organic macromolecules made up of chains of amino acids, which serve as the building blocks for muscle and tissue. Carbohydrates are made of simple sugars, while feed and rations are mixtures of various nutrients.

Multiple choice

Examples of amino acids include:

  1. Lysine , Methionine, Valine

  2. Iodine, Calcium, Magnesium

  3. Vaseline, Methadone, Lyceum

  4. Vinegar, Wine, Leon juice
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lysine, methionine, and valine are all examples of amino acids, which are the building blocks of proteins. The other options list minerals, non-food substances, or miscellaneous liquids.

Multiple choice

What are non-essential amino acids ?

  1. They are non-protein based acids

  2. They are synthetic acids

  3. They cannot be manufactured from other amino acids

  4. They can be manufactured in the body from other amino acids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Non-essential amino acids are those that an animal's body can synthesize on its own from other compounds. Because the body can manufacture them, they do not need to be directly supplied in the diet.

Multiple choice

What are essential amino acids?

  1. They can be manufactured in the mongastric animals body

  2. They cannot be manufactured in the mongastric animals body

  3. They are acids produced by the Liver

  4. They are a result of eating too much protein
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Essential amino acids cannot be synthesized by monogastric animals in sufficient quantities to meet their metabolic needs. Therefore, these amino acids must be provided directly in their feed.

Multiple choice

Proteins are made up of which elements?

  1. CHO

  2. CHONP

  3. CHON

  4. CHI
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Proteins are complex molecules made of amino acids, which contain carbon (C), hydrogen (H), oxygen (O), and nitrogen (N).

Multiple choice

Enzymes help complex chemical reactions to

  1. take place, speeding them up

  2. slow down

  3. stop
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Enzymes are biological catalysts that increase the rate of chemical reactions in the body by lowering the activation energy required.

Multiple choice

Enzymes are an example of a 

  1. Nucleic Acid

  2. Carbohydrate

  3. Protein

  4. Lipid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Enzymes are specialized proteins that catalyze chemical reactions in living organisms. They are folded into specific 3D shapes to perform their functions.