R4RIN – MCQs, Mock Tests | Aptitude Aptitude Mcq Questions Biology Diagnostic Test

Charge on ?-particles is

1. plus one
2. plus two
3. minus two
4. minus one

✅ Correct Answer: 2

?-particle ionizes an atom

1. through direct collision
2. through electrostatic attraction
3. through electrostatic repulsion
4. all of above

✅ Correct Answer: 3

T.V sets and microwave ovens emits

1. X-rays
2. ?-rays
3. ?-rays
4. ?-rays

✅ Correct Answer: 1

A ?-particle in a single encounter

1. loses a small fraction of its energy
2. losses most of its energy
3. loses no energy at all
4. loses all of its energy

✅ Correct Answer: 2

Strontium-90 is used as

1. ?-particle source
2. ?-particle source
3. ?-rays source
4. neutron source

✅ Correct Answer: 1

The penetration power of ?-particle as compared to ?-particle is

1. 10 times more
2. 100 times more
3. 100 times less
4. 10 times less

✅ Correct Answer: 2

Geiger counter is suitable for

1. fast counting
2. extremely fast counting
3. slow counting
4. all situations

✅ Correct Answer: 3

A ?-particle can produce fluorescence in

1. ZnS
2. barium platinocyanide
3. calcium tungstate
4. all of above

✅ Correct Answer: 4

Pair production cannot take place in vacuum as ________ is not conserved

1. energy
2. charge
3. mass
4. momentum

✅ Correct Answer: 4

CFC is used in

1. refrigeration
2. aerosol spray
3. plastic foam industry
4. all of above

✅ Correct Answer: 4

Average distance covered by ?-particle in air before its ionizing power ceases is called its

1. trajectory
2. range
3. firing level
4. limit

✅ Correct Answer: 2

Which one of the following possesses greater penetration power ?

1. ?-rays
2. ?-rays
3. ?-rays
4. neutron-rays

✅ Correct Answer: 4

The most useful tracer is

1. Sr-90
2. I-131
3. CA-41
4. C-14

✅ Correct Answer: 4

?-rays are electromagnetic waves like

1. light waves
2. heat waves
3. micro waves
4. x-rays

✅ Correct Answer: 4

Charge on ?-particle is

1. 1
2. -1
3. plus two
4. -2

✅ Correct Answer: 1

Why ?-rays are used to kill bacteria to sterilize surgical equipments etc?

1. chargeless
2. massless
3. highly penetrating
4. all of above

✅ Correct Answer: 3

?-particle ionizes an atom

1. due to electrostatic force of attraction
2. due to electrostatic force of repulsion
3. due to direct collision
4. due to gravitational force

✅ Correct Answer: 2

?-particles possess greater penetration power than that of ?-particles due to its

1. smaller ionization power
2. greater ionization power
3. neither greater nor smaller ionization power
4. same ionization power

✅ Correct Answer: 1

Pair production cannot take place in vacuum as

1. mass is not conserved
2. energy is not conserved
3. momentum is not conserved
4. charge is not conserved

✅ Correct Answer: 3

Pair production can take place only with

1. X-rays
2. ?-rays
3. UV-rays
4. IR-rays

✅ Correct Answer: 2

A device for producing high velocity nuclei is

1. cloud chamber
2. linear accelerator
3. a mass spectrograph
4. Wilson cloud chamber

✅ Correct Answer: 2

Which of the following will be a better shield against ?-rays?

1. ordinary water
2. heavy water
3. lead
4. aluminum

✅ Correct Answer: 3

The maximum safe limit dose for persons working in nuclear power station are

1. 1 rem per week
2. 5 rem per week
3. 4 rem per week
4. 3 rem per week

✅ Correct Answer: 2

Radiations are used for the treatment of skin of a patient is

1. ?-rays
2. ?-rays
3. ?-rays
4. X-rays

✅ Correct Answer: 2

The one which is present in all living things

1. Cell nucleus
2. DNA or RNA
3. Cell membrane
4. Vacuole

✅ Correct Answer: 2

The mechanism of stomatal movement is related to the branch of Biology called

1. Taxonomy
2. Physiology
3. Morphology
4. Anatomy

✅ Correct Answer: 2

Maximum number of species of living things on earth are

1. Algae
2. Fungi
3. Insects
4. Protozoa

✅ Correct Answer: 3

Variety among amino acids is produced due to

1. NH2 group
2. COOH group
3. R group
4. All of these

✅ Correct Answer: 3

Primary structure of proteins determines

1. Number of polypeptide chains involved
2. Bending of polypeptide chains
3. Amino acid sequence
4. Coiling of polypeptide chains

✅ Correct Answer: 3

The one which is not a globular protein

1. Anti Rh-antibody
2. Enzyme
3. Myosin
4. Haemoglobin

✅ Correct Answer: 3

An enzyme which converts a dipeptide into separate amino acids is an example of

1. Decarboxylase
2. Hydrolase
3. Oxidoreductase
4. Transferase

✅ Correct Answer: 2

Cellular digestion is associated with which organelle

1. Mitochondria
2. Golgi bodies
3. Plastids
4. Lysosomes

✅ Correct Answer: 4

The unicellular organisms ingest large molecules into their cytoplasm from the external environment without previously digesting them. This process is called

1. Diffusion
2. Osmosis
3. Phagocytosis
4. Plasmolysis

✅ Correct Answer: 3

Membranes of the grane are sites where

1. Oxygen is stored
2. Food is stored
3. Sunlight is trapped
4. CO2 is stored.

✅ Correct Answer: 3

The simplest of oxygen producting photosynthetic organisms are

1. Algae
2. Bacteria
3. Cyanobacteria
4. Chlamydomonas

✅ Correct Answer: 3

Protein coasts of viruses are synthesized in

1. Lytic cycle
2. Lysogenic cycle
3. Both a & b
4. All of these

✅ Correct Answer: 1

Mycoplasmas have been included in bacteria because

1. Do not have a cell wall
2. Are heterotrophic
3. Lack membrane bounded organelles
4. Reproduce by binary fission

✅ Correct Answer: 3

Yeasts reproduce asexually by forming

1. Asci
2. Basidia
3. Both a & b
4. Buds

✅ Correct Answer: 4

The one which can tolerate highest external osmotic pressure

1. Algae
2. Amoeba
3. Fungi
4. Bacteria

✅ Correct Answer: 3

Locomotory structures are not found in which of the following group

1. Amoebas
2. Zooflagellates
3. Ciliates
4. Apicomplexans

✅ Correct Answer: 4

The cell wall of oomycetes is chiefly composed of

1. Chitin
2. Cellulose
3. Lignin
4. Proteins

✅ Correct Answer: 2

One celled green ptotists are included in

1. Monera
2. Algae
3. Slime molds
4. Plants

✅ Correct Answer: 2

Pick the odd one out

1. Psilophyton
2. Rhynia
3. Cooksonia
4. Psilotum

✅ Correct Answer: 4

The one which is incorrect pair

1. Sori - Indusium
2. Arthrophytes - Jointed
3. Dichotomous - Vernation
4. Lycopods - Ground pries

✅ Correct Answer: 3

Double fertilization occurs in

1. All plants
2. All seed plants
3. Gymnosperms
4. Angiosperms

✅ Correct Answer: 4

Amphoixus is a

1. Chordate
2. Protochordate
3. Lower chordate
4. All of these

✅ Correct Answer: 4

Adult birds normally possess only one functional

1. Ureter
2. Ovary
3. Lung
4. Testis

✅ Correct Answer: 2

Following possess bilateral symmetry as larva and radial symmetry as adult:

1. Chordata
2. Hydra
3. Echinodermata
4. Hemichordata

✅ Correct Answer: 3

Which of the following are triploblastic and acoelomate?

1. Sponges
2. Annelida
3. Platyhelminthes
4. Aves

✅ Correct Answer: 3

Which of the following occurs in anaerobic respiration but not in aerobic respiration?

1. Release of CO2
2. Reduction of NAD
3. Formation of ATP
4. Production of ethanol from acetaldehyde

✅ Correct Answer: 4