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Mixed Test (Biology)

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The addition or deletion of one or more chromosomes in a set is called

  1. euploidy

  2. aneuploidy

  3. polyploidy

  4. heteroploidy


Correct Option: B
Explanation:

It is the state of having abnormal number of chromosomes.

Which of the following pairs of scientist and discovery is incorrectly matched?

  1. Meischer - Nucleotides

  2. Holler et al - Structure of tRNA

  3. Nageli and Cramer - Cell membrane

  4. Robert Brown - Nucleus


Correct Option: A
Explanation:

Nucleotides of DNA were first discovered by Oswarld Avery.

From which of the following bacteria is the hallucinogenic drug, LSD obtained?

  1. Claviceps purpurea

  2. Saccharomyces cerevisiae

  3. Penicillium notatum

  4. Rhizopus nigrican


Correct Option: A
Explanation:

Lysergic acid diethylamide (LSD) is obtained from this fungi.

Which of the following types of leucoplast stores starch?

  1. Amyloplast

  2. Elaioplast

  3. Aleuroplast

  4. Chromoplast


Correct Option: A
Explanation:

The name itself indicates that these are the starch containing leucoplasts.

What happens to the enzyme if it is heated to the boiling temperature?

  1. It gets activated.

  2. It gets inactivated.

  3. It gets denatured.

  4. It remains unaffected.


Correct Option: C
Explanation:

Enzymes are the proteins and the structures of enzymes get deactivated at boiling.

Fret channels are present in which of the following organelles?

  1. Endoplasmic reticulum (ER)

  2. Mitochondria

  3. Golgi bodies

  4. Chloroplasts


Correct Option: D
Explanation:

These are the membranous structures which have thalakoid having fret channels.

The pressure exerted by the walls of a cell on the protoplast is called

  1. wall pressure

  2. turgor pressure

  3. diffusion pressure

  4. osmotic pressure


Correct Option: A
Explanation:

Walls of a cell exert pressure on the cell content.

Which of the following is a triose sugar and a component of glycolysis?

  1. Ribulose

  2. Glyceraldehyde

  3. Mannose

  4. Galactose


Correct Option: B
Explanation:

It is an aldehyde derivative of glycerol, which is a 3 carbon compound.

Which of the following structures is present in mitochondria containing ATP synthetase?

  1. Oxysomes

  2. Peroxisomes

  3. Spherosomes

  4. Mesosomes


Correct Option: A
Explanation:

These are the particles present on the inner mitochondrial membrane and have ATP synthetase.

Which of the following is the causative agent of TB?

  1. Mycobacterium species

  2. Clostridium species

  3. Vibrio species

  4. Salmonella species


Correct Option: A
Explanation:

Mycobacterium tuberculosis causes TB.

Under which of the following disciplines is the study of blood vessels done?

  1. Angiology

  2. Chondriology

  3. Cardiology

  4. Haematology


Correct Option: A
Explanation:

It is the study of blood vessels.

What is the pattern of connection of two strands of DNA?

  1. A - T, C - G

  2. A - C, T - G

  3. A - G, T - C

  4. A - U, G - C


Correct Option: A
Explanation:

A makes a double bond with T and C forms a triple bond with G.

To which of the following subgroups of fungi does the yeast belong?

  1. Ascomycetes

  2. Zygomycetes

  3. Basidiomycetes

  4. Deuteromycetes


Correct Option: A
Explanation:

Fungi like yeast, neurospora and aspergillus belong to this group.

Who gave the following phrase,' Protoplasm is the physical basis of life'?

  1. Schultze

  2. Robert Hooke

  3. Schleiden

  4. Robert Brown


Correct Option: A
Explanation:

This phrase was coined by Schultze.

Which of the following types of enzymes is associated with the release of electrons in respiration?

  1. Oxidase

  2. Carboxylase

  3. Dehydrogenase

  4. Ligase


Correct Option: C
Explanation:

This type of enzyme releases hydrogen from substrate and thus releases electrons in respiration.

What is the shape of the apex of the lamina of shoe flower plant?

  1. Acute

  2. Caudate

  3. Obtuse

  4. Cuspidate


Correct Option: A
Explanation:

The apex forms a very acute angle towards lamina.

Which of the following cell organelles is present only in plant cell and not in animal cell?

  1. Mitchondria

  2. Ribosomes

  3. Golgi complex

  4. Plastids


Correct Option: D
Explanation:

Plastids are the organelles carrying colouring material and are present in plant cells only.

Which of the following cell structures lacks nuclear membrane and mitochondria?

  1. Bacterial cell

  2. Yeast cell

  3. Algal cell

  4. Protozoan cell


Correct Option: A
Explanation:

Bacteria are prokaryotes, they lack well defined nucleus and mitochondria for respiration.

What are the filaments constituting the chromosomes called?

  1. Chromomeres

  2. Chromatin

  3. Centromere

  4. Chromonema


Correct Option: B
Explanation:

These are the thread like structures which condense into chromosomes during prophase.

Verticillate phyllotaxy is present in which of the following plants?

  1. Nerium

  2. Eugenia

  3. Quisqualis

  4. Hibiscus


Correct Option: A
Explanation:

This is the kaner plant in which many leaves are present on one node.

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