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Biology (Mixed Test)

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The in-foldings of the inner mitochondrial membrane are called

  1. cristae

  2. oxysomes

  3. grana

  4. cisterns


Correct Option: A
Explanation:

Cristae are the folded structures that are formed by the in-foldings of inner mitochondrial membrane.

Which of the following organelles acts as the site of transcription?

  1. Mitochondria

  2. Ribosome

  3. Peroxisome

  4. Nucleus


Correct Option: D
Explanation:

It is the site where mRNA synthesise over nuclear chromosomal DNA.

Which of the following organelles is concerned with the fatty acid metabolism?

  1. Mesosomes

  2. Glyoxysomes

  3. Peroxisomes

  4. Spherosomes


Correct Option: B
Explanation:

These organelles are primarily concerned with beta oxidation of fatty acids and thus metabolises them.

Which of the following materials is abundantly found in the middle lamella of the plant cell?

  1. Lignin

  2. Cellulose

  3. Pectin

  4. Suberin


Correct Option: C
Explanation:

Pectin is present in the middle lamella.

Where is anthocyanin present in the cell?

  1. Chloroplast

  2. Chromoplast

  3. Leucoplast

  4. Vacuole


Correct Option: D
Explanation:

Anthocyanin pigment is present in the vacuoles of the plant cells.

If plant cells lose turgidity, but the signs of wilting are not visible externally, what type of wilting is exhibited by the plant?

  1. Incipient wilting

  2. Temporary wilting

  3. Nascent wilting

  4. Emergent wilting


Correct Option: A
Explanation:

It is just the begining phase of wilting.

What type of sugar is hemicellulose?

  1. It is a polysaccharide present in cell wall of leaves and petals of all plants.

  2. It is a disaccharide and is present in the cytoplasm of all plant cells.

  3. It is a polysaccharide present in cell wall of seeds and endosperm of certain plants.

  4. It is a disaccharide and is present in nucleoplasm of all plant cells.


Correct Option: C
Explanation:

It is present in the cell wall of seeds of date and endosperm of areca nuts.

What type of leaf modification is present in acacia plant?

  1. Leaf spine

  2. Leaf hook

  3. Leaf tendril

  4. Leaf scales


Correct Option: A
Explanation:

In this modification, the leaf gets modified to spine to protect the plant.

What are fats and their derivatives collectively known as?

  1. Fatty acids

  2. Steroids

  3. Sterols

  4. Lipids


Correct Option: D
Explanation:

These are the ester compounds that include all fats and oils.

Why is it recommended to boil the equipments properly before using them for surgery?

  1. To kill the pathogens which infect the instruments.

  2. To make the handling of instuments easier.

  3. To make the patient feel comfortable.

  4. To prevent the rusting of instruments during surgery.


Correct Option: A
Explanation:

This is the correct answer.

If it is given that 1 molar solution of sucrose develops a pressure of -27 bars on osmometer, what does it indicate?

  1. Pressure potential is -27 bars.

  2. Osmotic potential is -27 bars.

  3. Water potential is -27 bars.

  4. Solute pressure is -27 bars.


Correct Option: A
Explanation:

Pressure potential is a measureable mechanic pressure.

What is the shape of the apex in the plant Oxalis?

  1. Retuse

  2. Acute

  3. Cirrhose

  4. Imucronate


Correct Option: A
Explanation:

In this, the obtuse apex has a shallow notch.

To which of the following categories does the esterase enzyme belong?

  1. Oxidation-reduction enzymes

  2. Carboxylation enzymes

  3. Hydrolytic enzymes

  4. Desmolase enzymes


Correct Option: C
Explanation:

They break the ester bonds and hydrolyse the substrate.

Which of the following is not a function of nucleotides?

  1. Energy carrier

  2. Membrane receptors

  3. Genetic system

  4. Co-enzymes


Correct Option: B
Explanation:

The nuleotide acts as secondary receptors but not as the membrane receptors.

What is the study of nests of birds called?

  1. Nosology

  2. Nidology

  3. Kalology

  4. Kinesology


Correct Option: B
Explanation:

The study of bird nest is called nidology.

When the pollen grains are placed in a beaker containing water, they will

  1. swell without forming any pollen tubes

  2. swell and ultimately die out

  3. germinate and produce a pollen tube

  4. form exceptionally large number of pollen grains


Correct Option: A
Explanation:

The exosmosis of water will take place with swelling of the cell placed in water.

Which of the following types of compound leaves is present in Rose plant?

  1. Imparipinnate

  2. Bipinnate

  3. Unifoliate palmate

  4. Trifoliate palmate


Correct Option: A
Explanation:

In this type, the leaves are present on the rachis in an odd number and so are called unpaired.

Which type of venation is present in banana leaves?

  1. Unicostate parallel

  2. Multicostate divergent

  3. Multicostate convergent

  4. Unicostate reticulate


Correct Option: A
Explanation:

This type of venation is present in banana plants. In this venation, veins start from the midrib and run towards the coast.

In which of the following plants is the cauline type of insertion of leaves found?

  1. Turnip

  2. Carrot

  3. Dalbergia

  4. Maize


Correct Option: D
Explanation:

In this, the leaves are borne directly on the nodes of the stem.

Which of the following is the main function of rough endoplamic reticulum?

  1. Protein synthesis

  2. Fat storage

  3. Respiration

  4. Photosynthesis


Correct Option: A
Explanation:

They have ribosomes attached on their surfaces and take part in protein synthesis.  

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