Biomolecules-2 Set 4 MCQs

Q1 | which kind of arrangement lies in the two polynucleotide chain of DNA?

Antiparallel and complementary

parallel and complementary

Independent

None above

Q2 | If the one base chain sequence of DNA is ACGTTGG then what will be the base Sequence of opposite chain

TGCAACC

GTAGGAA

CATGGTT

TAGCCGG

Q3 | What is ATP?

Pentose sugar + adenine + 3 molecule phosphate

Hexose sugar + adenine + 3 molecule phosphate

Amino acid + adenine + 3 molecule phosphate

a or b both

Q4 | What is enzyme?

All proteins which are in all living cell

Chemicals which act as biological catalysts

All amino acid which are in polypeptide chain

All above

Q5 | Which of the following is not true for enzyme

Water soluble and colloidal in nature

Lowers the activation energy level

Used up in the biochemical reaction

Affected by the change in temperature

Q6 | What is Ribozymes?

Only nucleic acids

ony protein

Some nucleic acids that behave like enzyme

M ore than one Ribosome

Q7 | Enzymes are present in which parts of plant?

Only in leaves

Only in fruits

In apical meristem of root and shoot

in all the living cell of plant body

Q8 | What is an apoenzyme?

Protein

Amino acid

metallic ions

Carbohydrates

Q9 | What is co – enzyme?

Always a protein

always a amino acid

Often a vitamin

Often a protein

Q10 | Find out the correct function of co-enzyme?

In association with apoenzyme and make it effective

Independently of the apoenzyme

In association with any protein and make it effective

None above

Q11 | Which one property is not true for enzyme?

It effective for one reaction is not useful in another reaction

It is amphoteric in nature

All enzymes are bidirectional

They are not destroyed

Q12 | The rate of most of enzyme catalyzed reaction changes with PH as the PH Increases this rate?

Reaches a maximum

Reaches a minimum

Decreases

Increases

Q13 | Near freezing point an enzyme is

Slightly activated

Inactivated

Denatured

Destroyed

Q14 | A temperature change from 30oC to 50oC the rate of enzyme actively will:

Increase

Decrease

First increase and then decrease

First decrease and then increase

Q15 | An enzyme brings about

Activation energy level

Increase in reaction time

Decrease in activation energy level

all above

Q16 | Enzymes are polymers of:

Fatty acid

Phosphate

Amino acid

Nucleotides

Q17 | Which one is not correct for enzyme?

They all are biocatalysts

They all are colloidal

They all are proteins

All proteins are enzymes

Q18 | Inorganic catalyst recognized what when it attached an enzyme?

Activator

Co- enzyme

Inhibitor

Apoenzyme

Q19 | At which place the substrate combines with the enzymes:

Active site

inactive site

Common site

Gap site

Q20 | Fill it E + S ?________

E-S

E-S complex

product

enzyme

Q21 | Enzyme and substrate complementary each other such as

Pencil & eraser

Pen & Paper

Lock & key

all above

Q22 | Which one of the following chemical is classified as an enzyme?

Try glyceride

Cellulose

Galactose

Sucrase

Q23 | In the cell digestive enzymes are mostly in which cell organells?

Ribosome

vacuoles

Lysosomes

Mitochondria

Q24 | Enzymes are named after their substrate adding suffix –

—- In

— ase

— ose

— on

Q25 | The enzyme which removes hydrogen from the substrate is known as:

Oxido-reductase

Dehydrogenase

Hydrogenase

Hydrolyses