Biomolecules practice · Medium

Which of the following are alkaloids?

In an experiment it was found that adenine constitutes 31% and guanine 19%. The quantity of cytosine in this DNA is likely to be

One of the secondary structures exhibited by DNA is…..

Which of the following are not secondary metabolites in plants?

The inhibitor which inhibits the enzyme activity by binding to the active site of the enzyme, due to the close resemblance to the substrate in its molecular structure is called

These are projected inside from the polynucleotide backbone

Types of amino acids found in proteins are

The following pair of elements are relatively abundant in living organisms than in earth’s crust

Assertion (A): The Michaelis Menten constant $\left(\mathrm{K}_{\mathrm{m}}\right)$ can be used to compare catalytic efficiency of two different enzymes.

Reason (R): The $\mathrm{K}_{\mathrm{m}}$ value is numerically equal to the substrate concentration at which $\frac{1}{2}$ of $V_{\max }$ is achieved.

In the light of the above statements, choose the correct answer from the option given below.

The form of DNA with 34Å pitch with a rise per base pair of 3.4Å is called

Sugar-phosphate backbone in nucleic acid

Identify the ascending sequence of the Classes of the following enzymes as per the IUB system

I. Arginosuccinase
II. Nitrate reductase
III. Pepsin
IV. Hexokinase

Which of the following statements are correct?
I. Acetic acid can form cholesterol
II. Flow of metabolites through metabolic pathway has a definite rate and direction. It is called dynamic state of body constituents
III. Anabolic pathway is endergonic while catabolic pathway is exergonic
IV. All biomolecules have a term over, i.e., they are constantly being changed into some other biomolecules and also made from other biomolecules
The correct options is

Which of the following statement is wrong regarding chitin?

If in a ds B-DNA fragment 200 bases are present then what would be its length?

A phosphoglyceride is always made up of

A series of reactions which occur to form a compound (or) degrade a compound put together are called

How many of the below given macromolecules are not correctly paired with one of their characteristics?

a. Chitin - Its basic unit is a nitrogen containing glucose derivative.

b. Cellulose - Unbranched polymer of glucose which produces blue colour with iodine.

c. Haemoglobin - Has four subunits i.e., polypeptide chains forming a quaternary structure.

d. GLUT 4 - Enables insulin transport into cells.

In a polypeptide the first amino acid is represented as

Enzymes that catalyze inter-conversion of optical, geometrical or positional isomers, are

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

If a B-DNA contains 40% thymine then calculate the sum total of thymine and guanine.

Consider the following statements:
i) In proteins, right handed helices are observed
ii) In a polysaccharide chain, the right end is called the reducing end
iii) B-DNA is generally coiled in left handed fashion
Which of the statement(s) given above is/are incorrect?

Which of the following is a heteropolymer?

Primary structure of proteins is due to the presence of

Assertion: Living organisms have more nitrogen and oxygen per unit mass than inanimate objects (e.g., earth crust).

Reason: Living organisms have more $Ca, Mg, Na$ in them than inanimate object.

Assertion (A): Lipids whose molecular weight does not exceed 800 Dalton come under acid insoluble fraction.

Reason (R): Lipids are present not only as such but also arranged in structures like membranes during grindig these lipid from vesicle.

Given below is the chemical formula of $\mathrm{C}{\mathrm{H}_3}{\left( {\mathrm{C}{\mathrm{H}_2}} \right)_{14}} - \mathop \mathrm{C}\limits^{\mathop {||}\limits^O } - \mathrm{OH}$

Fluidity of bio-membranes can be shown by

The bond present between two carbohydrate molecules is