Tag: food and it's constituents

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Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

What are carbohydrates?

  1. Aldehydic and ketonic derivatives.

  2. Polyhyrdroxy compounds.

  3. Optically active substances and hydrates of carbon.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbohydrates are polyhydroxy aldehydes and ketones. They have two functional groups alcohol and either aldehyde or ketone. Most common carbohydrates are compounds of carbon, hydrogen and oxygen where hydrogen and oxygen occur in the ration of 2:1 like water. Hence, carbohydrates are also called as hydrates of carbon. Carbohydrates have asymmetric carbon atoms, hence, carbohydrates are optically active and rotate the plane of polarised light .

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

The molecule of biological kingdom most abundant on earth is ...................... with ....................... monomers.

  1. Cellulose, glucose

  2. Starch, glucose

  3. Glycogen, amylose

  4. Actin, amylopectin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cellulose is the most abundant organic polymer on earth. Cellulose is an important structural component of the primary cell wall of green plants. Glucose is one of the primary molecules, which serve as energy sources for plants and animals. It is the most important simple sugar in human metabolism. Cellulose can be broken down chemically into its glucose units by treating it with concentrated acids at high temperature.

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

Carbohydrates, the most abundant biomolecules on earth, are produced by

  1. All bacteria, fungi and algae.

  2. Fungi, algae and green plant cells.

  3. Some bacteria, algae and green plant cells.

  4. Viruses, fungi and bacteria.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Carbohydrates are the most abundant bimolecules found on the surface of the earth. This is so because every year plants and alga through the process of photosynthesis converts more than 100 billion metric tones of carbondioxide and water to cellulose and other products for use by the plants. 

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

Carbohydrates which cannot be further hydrolysed into simple form are

  1. Monosaccharides

  2. Disaccharides

  3. Oligosaccharides

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

Simple carbohydrates are generally soluble sugars. Simpler carbohydrates are of two types Monosaccharides and Oligosaccharides. Monosaccharides are monomer sugars which cannot be hydrolysed further into smaller units, e.g., trioses, tetroses, pentoses, hexoses and heptoses. Oligosaccharides are made up of a few units of monosaccharides.

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

The substance which is synthesized in Golgi body is?

  1. Protein

  2. Polysaccharides

  3. Fats

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

The substance which is synthesized in golgi body is polysaccharides. Golgi is a part of the cellular endomembrane system, the Golgi apparatus packages proteins into membrane-bound vesicles inside the cell before the vesicles are sent to their destination. The Golgi apparatus resides at the intersection of the secretory, lysosomal, and endocytic pathways. It is of particular importance in processing proteins for secretion, containing a set of glycosylation enzymes that attach various sugar monomers to proteins as the proteins move through the apparatus.

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

The cell wall of plants is made up of cellulose, which is

  1. A lipid

  2. A protein

  3. A polysaccharide

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

In the primary plant cell wall, the major carbohydrates are cellulose, hemicellulose and pectin. The cellulose microfibrils are linked via hemicellulosic tethers to form the cellulose-hemicellulose network, which is embedded in the pectin matrix. The most common hemicellulose in the primary cell wall is xyloglucan.

Multiple choice biology food and it's constituents energy giving food carbohydrate and its test biological molecules

The bonds present between two carbohydrates molecule is

  1. Glycosidic

  2. Hydrogen bond

  3. Phosphodiester

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

The bonds present between two carbohydrate molecules is glycosidic. A glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate. A glycosidic bond is formed between the hemiacetal or hemiketal group of a saccharide and the hydroxyl group of some compound such as an alcohol. A substance containing a glycosidic bond is a glycoside.