Biology Final Exam
You are about to begin your final exam:
- This exam comprises 50 multiple choice questions.
- You must select the best answer among 5 choices.
- You will have 30 seconds to answer each question.
- You will be awarded 5 points for each correct answer.
- You will lose 2 points for each incorrect answer.
- You need 150 points to pass this exam.
Press the "next" button to proceed. Good luck.
You are about to begin your final exam:
- This exam comprises 50 multiple choice questions.
- You must select the best answer among 5 choices.
- You will have 30 seconds to answer each question.
- You will be awarded 5 points for each correct answer.
- You will lose 2 points for each incorrect answer.
- You need 150 points to pass this exam.
Press the "next" button to proceed. Good luck.
During photosynthesis:
Light reactions produce sugar, while the Calvin cycle produces O2
Light reactions produce NADPH and ATP, while the Calvin cycle produces sugar
Light reactions photophosphorylate ADP, while the Calvin cycle produces ATP
Light reactions photophosphorylate ATP, while the Calvin cycle produces ADP
The Calvin cycle produces both sugar and O2
During oogenesis the cell that is fertilized by a sperm to become an egg is:
Primary spermatocyte
Secondary oocyte
Tertiary oocyte
Primary oocyte
Secondary spermatocyte
One strand of DNA has the following sequence of nucleotide 3’ ATTCGCTAT 5’ so the other strand of DNA has:
3’ TAAGCGATA 5’
5’ TAAGCGATA 3’
5’ GACGCGATA 3’
3’ GACGCGATA 5’
3’ GACGCGATA 3’
Feedback inhibition of enzymes is affected by which of the following:
Enzyme
End products
Substrate
Intermediate end products
Bi-products
If a patient is advised to take more meat, butter milk and eggs in his diet. The person is:
Suffering from rickets
Suffering from Kwashiorkor disease
Can not see in the dark
Suffering from scurry
Suffering from anemia
Correct enzyme-substrate pair is:
Carbohydrate-lipase
Casein-rennin
Protein-amylase
Carbohydrate-lipase
Albumin-creatinine
Which of the following is not a conjugated protein?
Phosphoprotein
Peptone
Lipoprotein
Chromoprotein
Flavoprotein
Damage to thymus in children may lead to:
Loss of antibody mediated immunity
Loss of cell-mediated immunity
Reduction in stem cell production
Reduction of hemoglobin content of blood
Pancytopenia
Chemical signals released by an organism that influence the behavior of other individuals of the same species are called:
Insulin
Pheromone
Androgen
Steroids
Dopamine
Deficiency of adrenal cortex hormones results in:
Tetany
Addison disease
Cushings disease
Cretinism
Acromegaly
A doctor suggested to a couple not to have more than one child because of:
Rh- male Rh+ female
Rh+ male Rh- female
Rh- male Rh- female
Rh+ male Rh+ female
Rh+ or Rh- male Rh+ female
An insect bite may result in inflammation of that spot. It is triggered by alarm chemicals such as:
Histamine and dopamine
Histamine and kinins
Interferon and opsonin
Interferons and histones
Cytokines and histones
Secretory cells that release relatively large quantities of glycoproteins contain relatively large amounts of which of the following?
Rough endoplasmic reticulum
Golgi apparatus
Smooth endoplasmic reticulum
Mitochondria
Centrioles
Carrier ions like Na+ facilitate the absorption of substances like:
Amino acids and glucose
Fructose and some amino acids
Glucose and fatty acids
Fatty acids and glycerol
Fatty acids and carbohydrates
If for some reason our goblet cells are non-functional this will adversely affect:
Production of somatostatin
Smooth movement of food down the intestine
Secretion of sebum from the sebaceous glands
Maturation of sperms
Absorption of key nutrients
What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin
In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
Gastric juice will be deficient in pepsinogen
Gastric juice will be deficient in chymosin
Absorption of nutrients will be impaired
A young infant may be feeding entirely on mother's milk which is white in colour but the stool which the infant passes out is quite yellowish. What is this yellow colour due to?
Pancreatic juice poured into duodenum
Bile pigments passed through bile juice
Intestinal juice
Undigested milk protein casein
Intestinal bacteria
Aggregates of lymphoid tissue present in the distal portion of the small intestine are known as:
Villi
Peyer’s patches
Rugae
Choroid plexus
Lymphadenopaty
An action potential in the nerve fibre is produced when positive and negative charges on outside and the inside of the axon membrane are reversed because:
Most potassium ions leave the axon
More sodium ions enter the axon as compared to potassium ions leaving it
More potassium ions enter the axon as compared to sodium ions leaving it
Influx of sodium ions entering the axon
The influx rates of sodium and potassium within the cell differ initially
Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?
Vacuoles and fibres
Perikaryon and dendrites
Flagellum and medullary sheath
Nucleus and mitochondria
Nerve cells and other cell types do not differ in structure
Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that:
Nerve fibre is insulated by a medullary sheath
Neurotransmitters are released by the axon endings and not by dendrites
Sodium pump starts operating only at the cyton and then continues into the nerve fibre
Neurotransmitters are released by dendrites and not by axon endings
Nsodium pump starts operating only at the dentrite and then continues into the nerve fibre ucture
If vagus nerve in man is damaged, which of the following will not be affected?
Pancreatic secretion
Tongue movements
Gastrointestinal movements
Cardiac movements
Respiration
Cornea transplant in humans is almost never rejected. This is because:
It is a non-living layer
It has no blood supply
Its cells are least penetrable by bacteria
It is composed of enucleated cells
It is not innervated
Typical ‘lubb-dup’ sounds heard in heart beat are due to:
Closing of bicuspid and tricuspid valves
Closure of bicuspid-tricuspid valves followed by semilunar valves
Closing of semilunar valves
Blood under pressure through aorta
Opening of bicuspid-tricuspid valves followed by closure of semilunar valves
The valve surrounding opening of coronary sinus is:
Eustachian valve
Thebesius valve
Mitral valve
Tricuspid valve
Semilunar valve
Wall of blood capillary is formed of:
Haemocytes
Endothelial cells
Parietal cells
Oxyntic cells
Columnar cells
Which is correct about leucocytes:
They are red coloured
They can cross capillaries
They are enucleate
Decrease in their number causes Leukemia
Increase in their number indicates viral infection
The maximum volume of air that can be released from the lungs by forceful expiration after deepest inspiration is called the:
Total lung capacity
Vital capacity
Tidal volume
Ventilation rate
Forced expiratory volume
Which one of the following statement is NOT correct regarding trachea?
It splits into the right and left bronchi to supply air to the lungs
It usually lies posterior to the muscular esophagus
Opening to the trachea is covered by epiglottis
Tracheal rings are C-shaped
It is cartiliginous
Respiratory center is located in the:
Pneumotaxic center
Medulla oblongata
Alveoli
Apneustic center
Hypothalamic center
Which one of the following statements is NOT correct?
The nasal cavity warms and humidifies the air before it enters the lungs
The visceral pleura is in direct contact with the chest wall
The right lung is composed of three lobes, but the left lung has only two lobes
Lung volumes and vital capacity measure lung function
All statements are true
Which one of the following is wrong statement?
Nitrosomonas and Nitrobacter are chemoautotrophs
Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins
Anabaena and Nostoc are capable of fixing nitrogen in free-living state also
Root nodule forming nitrogen fixers live as aerobes under free-living conditions
All statements are true
The catalytic efficiency of two different enzymes can be compared by the:
Molecular size of the enzyme
The Km value
Molecular shape of the enzyme
The pH optimum value
Formation of the product
Which one of the following amino-acids was not found to be synthesized in Miller's experiment?
Aspartic acid
Glutamic acid
Glycine
Alanine
All were found to be synthesized in Miller's experiment
Which of the following statements regarding enzyme inhibition is correct?
Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein
Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme
Non-competitive inhibitors often bind to the enzyme irreversibly
Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate
Non-competitive inhibition of an enzyme can be overcome by negative feedback
Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these:
Are exclusively synthesized in the body of a living organism as at present
Help in regulating metabolism
Enhance oxidative metabolism
Are conjugated proteins
Are conjugated glycoproteins
Carbohydrates, the most abundant biomolecules on earth, are produced by:
Fungi, algae and green plants cells
Some bacteria, algae and green plant cells
All bacteria, fungi and algae
Some viruses, fungi and bacteria
Some fungi, algae and green plants cells
Given below are two statements A and B. Choose the correct answer related to the statements.
Statement A - Amino acids are amphoteric in their function.
Statement B - All amino acids are necessary for our body.
Statement A is wrong, statement B is correct
Both the statements A and B are correct
Statement A is may be correct in certain circumstances, statement B is correct
Both the statements A and B are wrong
Statement A is correct, statement B is wrong
In which one of the following sets of three items each belong to the category mentioned against them?
Lysine, glycine, thiamine — Amino acids
Rennin, helicase and hyaluronidase — Enzymes
Myosin, oxytocin and gastric — Hormones
Optic nerve, oculomotor, vagus — Sensory nerves
Insulin, Glucagon, GLP-1 - Pancreatic hormones
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