Chapter: Cell: The Unit of Life

Which of the following are not secondary metabolites in plants?

Floridean starch has structure similar to

Which two functional groups are characteristic of sugars?

The chitinous exoskeleton of arthropods is formed by the polymerisation of

Which one of the following is a non-reducing carbohydrate?

Macromolecule chitin is

Which one of the following pairs is wrongly matched?

About 98 per cent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

Which of the following is a reducing sugar?

Most abundant organic compound on earth is

Lactose is composed of

Cellulose, the most important constituent of plant cell wall is made of

In which one of the following groups, all the three are examples of polysaccharides?

Glycogen is a polymer of

Living cell contains 60-75% water. Water present in human body is

Which one of the following is the most abundant protein in the animals?

Identify the substances having glycosidic bond and peptide bond respectively in their structure.

Identify the basic amino acid from the following.

“Ramachandran plot” is used to confirm the structure of

Which of the following is an amino acid derived hormone?

Which of the following is the least likely to be involved in stabilising the three-dimensional folding of most proteins?

Which one is the most abundant protein in the animal world?

Which one out of A-D given below correctly represents the structural formula of the basic amino acid?

Which of the following is the simplest amino acid?

Collagen is

Which is an essential amino acid?

Conjugated proteins containing carbohydrates as prosthetic group are known as

What is common among amylase, rennin and trypsin?

Most diverse macromolecules, found in the cell both physically and chemically are

The pyrenoids are made up of

Amino acids are produced from

Following are the statements with reference to lipids.
I. Lipids having only single bonds are called unsaturated fatty acids.
II. Lecithin is a phospholipid.
III. Trihydroxy propane is glycerol.
IV. Palmitic acid has 20 carbon atoms including carboxyl carbon.
V. Arachidonic acid has 16 carbon atoms.
Choose the correct answer from the options given below

Which of the following are not polymeric ?

A typical fat molecule is made up of

A phosphoglyceride is always made up of

Which one of the following is not a constituent of cell membrane?

Lipids are insoluble in water because lipid molecules are

Which steroid is used for transformation?

Spoilage of oil can be detected by which fatty acid?

Match the List-I with List-II.
List-I                                                   List-II
A. Protein                                        1. C= C double bonds
B. Unsaturated fatty acid              2. Phosphodiester bonds
C. Nucleic acid                                3. Glycosidic bonds
D. Polysaccharide                          4. Peptide bonds
Choose the correct answer from the options given below.

Match the items in Column I with those in Column II.
ColumnI                                Column II
A. Aquaporin                          (i) Amide
B. Asparagine                        (ii) Polysaccharide
C. Abscisic acid                     (iii) Polypeptide
D. Chitin                                 (iv) Carotenoids
Select the correct option.

DNA precipitation out of a mixture of biomolecules can be achieved by treatment with

Which one of the following statements is wrong?

Which of the following biomolecules does have a phosphodiester bond?

Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank component X in it

Which one of the following structural formula of two organic compounds is correctly identified along with its related function?

Which one of the following is the correct matching of three items and their grouping category?Items Group
(1) Malleus, incus, cochlea— Ear ossicles
(2) Ilium, ischium,pubis— Coxal bones of pelvic girdle
(3) Actin, myosin, rhodopsin— Muscle proteins
(4) Cytosine, uracil, thymine—Pyrimidines

Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?

In the DNA molecule

The two polynucleotide chains in DNA are

One turn of the helix in a B-form DNA is approximately

Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

ATP is a

Which one of the following amino acids is an essential part of human diet ?

Radioactive thymidine when added to the medium surrounding living mammalian cells gets incorporated into the newly synthesised DNA. Which of the following types of chromatin is expected to become radioactive if cells are exposed radioactive thymidine as soon as they enter the S-phase?

DNA synthesis can be specifically measured by estimating the incorporation of radio labelled

The nitrogenous organic base purine occurring in RNA is

Two free ribonucleotide units are interlinked with

Which is wrong about nucleic acids?

Adenine is

Which is distributed more widely in a cell?

The basic unit of nucleic acid is

DNA is composed of repeating units of

In RNA, thymine is replaced by

RNA does not possess

In double helix of DNA, the two DNA strands are

Match the following columns.
Column I                                                       Column II
A. Inhibitor of catalytic activity                     1. Ricin
B. Possess peptide bonds                               2. Malonate
C. Cell wall material in fungi                         3. Chitin
D. Secondary metabolite                               4. Collagen
Choose the correct option.

Prosthetic groups differ from coenzymes in that

Which of the following is a commercial blood cholesterol lowering agent?

Consider the following statement
(i) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group.
(ii) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme.
Select the correct option.

Select the correct match

Which one of the following statements is correct, with reference to enzymes?

Which of the following describes the given graph correctly?

A non-proteinaceous enzyme is

Select the option which is not correct with respect to enzyme action.

Transition state structure of the substrate formed during an enzymatic reaction is

The essential chemical components of many coenzymes are

The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration). What do the two axis (X and Y ) represent?

Modern detergents contain enzyme preparation of

A competitive inhibitor of succinic dehydrogenase is

An organic substance bound to an enzyme and essential for its activity is called

An enzyme that can stimulate germination of barley seeds is

Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain?

Which of the following statements regarding enzyme inhibition is correct?

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these

The catalytic efficiency of two different enzymes can be compared by the

The major role of minor elements inside living organisms is to act as

Hydrolytic enzymes which act at low pH are called as

Cytochrome is

Enzymes enhance the rate of reaction by

Feedback inhibition of an enzymatic reaction is caused by

Cofactor (coenzyme) is a part of holoenzyme it is

An enzyme brings about

Enzymes having slightly different molecular structure but performing identical activity are

Which of the following is not a part of enzyme but it activates the enzyme?