R4RIN – MCQs, Mock Tests | Biology Biology MCQS section -2

Which of the following hormones has intracellular receptors?

1. cortisol.
2. insulin.
3. epinephrine.
4. none

✅ Correct Answer: 1

Flowers in which polllination takes place by insect their pollen grains are ________

1. Smooth and dry
2. Rough and sticky
3. Rough and dry
4. Large in Size

✅ Correct Answer: 2

In which organ RBC are selectively destroyed/recycled by macrophages?

1. Kidney
2. Pancreas
3. Spleen
4. Liver

✅ Correct Answer: 3

Which organ is the main digester and absorber of food?

1. Stomach
2. Liver
3. Colon
4. Small intestine

✅ Correct Answer: 4

Infection of salivary glands by a virus leads to

1. tetanus
2. mumps
3. pyorrhoea
4. ulcers

✅ Correct Answer: 2

Which of the following is not a function of saliva?

1. contains fluoride to harden the tooth enamel
2. moistens food and helps stick it together to make it easier to swallow
3. begins the chemical breakdown of starches
4. helps clean the mouth

✅ Correct Answer: 1

Scientist who discovered blood groups

1. Krebs
2. Pavlov
3. Karl Landsteiner
4. Darwin

✅ Correct Answer: 3

Muscles get tired when there is shortfall of ___________.

1. Lactic acid
2. Na+ ions
3. ATP
4. Sulphates

✅ Correct Answer: 3

The rate of respiration per minute in a new born baby

1. 18 times
2. 32 times
3. 26 times
4. 16 times

✅ Correct Answer: 2

Which tissue provides support to plants and also stores food?

1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. No option is correct

✅ Correct Answer: 1

Closely stacked flattened sacs (plants only)

1. Vacuoles
2. Lysosomes
3. Golgi apparatus
4. None of the above

✅ Correct Answer: 3

The arbor vitae refers to

1. the pleatlike convolutions of the cerebellum
2. cerebellar gray matter
3. flocculonodular nodes
4. cerebellar white matter

✅ Correct Answer: 4

Which organelle is the control center of a cell?

1. Nucleus
2. Cytoplasm
3. Cell membrane
4. endoplasmic reticulum

✅ Correct Answer: 1

Which of the following is an Autoimmune disease?

1. Systematic lupus erythematosus
2. Acute anaphylaxis
3. Farmer's lung
4. A heart attack

✅ Correct Answer: 1

Which statement regarding the mammalian heart is correct?

1. Blood is pumped from the heart via the atria.
2. Oxygen-loaded blood moves only through the right side of the heart.
3. When the right atrium contracts, it forces blood into the left atrium.
4. In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs.

✅ Correct Answer: 4

Who is known as father of Biology

1. Aristotle
2. Darwin
3. Lamark
4. Linneus

✅ Correct Answer: 1

Melvin calvin got Noble Prize for his studies on

1. Light reaction
2. Plant hormones
3. Carbon fixation
4. Photons

✅ Correct Answer: 3

Select the correct statement about cellular respiration?

1. All the carbon atoms in glucose ultimately incorporated during cellular respiration into carbon dioxide molecule
2. All the carbon atoms in glucose ultimately incorporated during cellular respiration into NADH molecule
3. All the carbon atoms in glucose ultimately incorporated during cellular respiration into ATP molecule
4. All the carbon atoms in glucose ultimately incorporated during cellular respiration into water molecule

✅ Correct Answer: 1

The external oblique muscle is named due to its

1. Action
2. Fiber detection
3. Location
4. Attachment points

✅ Correct Answer: 2

Photosynthesis fulfills which of the following requirements of the autotrophic organisms? I. Carbon II. Water III. Energy

1. Only I
2. Only III
3. I and III
4. All I, II and III

✅ Correct Answer: 3

Where does cellular respiration take place in the cell?

1. cytoplasm
2. mitochodria
3. Ribosomes
4. Chromosomes

✅ Correct Answer: 2

Study of inter relationship between living organism and their environment is called _______

1. Plant Geography
2. Plant social science
3. Ecology
4. Ecosystem

✅ Correct Answer: 3

The storage form of glucose in animals is

1. Starch
2. Glucose
3. Glycogen
4. None of the above

✅ Correct Answer: 3

Which statement is true about blood alcohol concentration?

1. The higher the blood alcohol concentration, the more severe the hangover will be.
2. Drinking coffee and exercising will lower your blood alcohol concentration.
3. Blood alcohol concentration is affected by factors such as body size and gender.
4. None of the above

✅ Correct Answer: 3

Which formula represents an amino acid?

1. R-CH3(NH2)-COOH
2. R-CH(NH2)-COOH
3. R-CH2(NH2)-COOH
4. R-CH3(NH2)-COH

✅ Correct Answer: 2

Sponges are most accurately described as

1. marine predators
2. chemoautrophs
3. filter feeders
4. freshwater scavengers

✅ Correct Answer: 3

Organisms that live in the deep sea are mainly

1. Herbivores
2. Carnivores
3. Detritivores
4. None of the above

✅ Correct Answer: 3

The inherited traits of an organism are controlled by

1. DNA
2. Enzymes
3. Nucleotides
4. RNA

✅ Correct Answer: 1

Lobar Pneumonia refers to a lung infection in which it affects

1. large part of the lobe or lung
2. small segment of the lung
3. both lungs
4. None of the above

✅ Correct Answer: 1

Organisms that depend only on raw plant products are said to be

1. herbivorous
2. vegetarian
3. carnivorous
4. omnivorous

✅ Correct Answer: 1

How many amino acids are found in living organisms?

1. 1500
2. 3000
3. 20
4. 4

✅ Correct Answer: 3

Important component that helps in clotting of the blood is called ____.

1. Haemoglobin
2. Platelets
3. Serum
4. Plasma

✅ Correct Answer: 2

Secondary consumers are eaten by larger

1. fast animal
2. animal in the third trophic level
3. herbivorous animal
4. predator

✅ Correct Answer: 4

In photosynthesis________

1. Light energy is converted into chemical energy
2. Chemical energy is converted into Light energy
3. Chemical energy is converted into electrical energy
4. Light energy is converted into Mechanical energy

✅ Correct Answer: 1

Genes are made of

1. Carbohydrates
2. Proteins
3. Fats
4. Nucleotides

✅ Correct Answer: 4

Phage typing is based on the fact that

1. viruses cause disease
2. bacteria and viruses are related
3. bacteria are destroyed by viruses
4. bacterial viruses attack specific cells

✅ Correct Answer: 4

Which of the following is not a function of proteins?

1. Build tissues such as bone and muscle
2. Help to fight disease
3. Nail formation
4. Store and transmit Heredity

✅ Correct Answer: 4

Synapsis occurs during

1. Mitosis
2. Meiosis
3. Both A & B
4. None

✅ Correct Answer: 2

Compared to land, the open oceans

1. are rich in silica and iron
2. are nutrient-poor environments
3. contain unlimited nitrogen
4. are nutrient-rich environments

✅ Correct Answer: 2

Nucleoli are present during

1. prophase
2. anaphase
3. interphase
4. prometaphase

✅ Correct Answer: 3

Veins seen in the leaves, serve the function of

1. Transpiration
2. Photosynthesis
3. Storage
4. Conduction

✅ Correct Answer: 1

Which of these is Not a Carcinogen?

1. Cadmium
2. Asbestos
3. Benzene
4. All the above

✅ Correct Answer: 4

Which of the following can be a symptom of AIDS?

1. Hair loss
2. Severe weight gain
3. Tiredness
4. All the above

✅ Correct Answer: 3

Higher doses of barbiturates result in

1. Lack of emotional control
2. Impaired thinking
3. Both A & B
4. None of the above

✅ Correct Answer: 3

Which of the following organelle is known as the 'Power House' of the cell?

1. Golgi Bodies
2. Ribosomes
3. Mitochondria
4. None of these

✅ Correct Answer: 3

Which of the following muscular tissue is multinucleated?

1. Smooth muscle
2. Cardiac muscle
3. Skeletal muscle
4. Unstriated muscle

✅ Correct Answer: 3