Biology and Chemistry Quiz

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Questions and Answers

Which element has two unpaired electrons in its outer shell in the ground state?

Phosphorus (P)

Barium (Ba)

Chlorine (Cl)

Silicon (Si) (correct)

Which series contains only acidic oxides?

Carbon dioxide, Silicon dioxide, Nitrous oxide, Sulfur trioxide

Calcium oxide, Carbon monoxide, Phosphorus pentoxide, Nitrogen dioxide

Phosphorus trioxide, Aluminum oxide, Nitrogen pentoxide, Sulfur dioxide

Vanadium pentoxide, Chromium trioxide, Tellurium trioxide, Manganese heptoxide (correct)

How many structural isomers are possible for C3H8O?

3 (correct)

To which subclass does a glycerophospholipid belong?

Glycerophospholipids Signup and view all the answers

Which of the following is classified as a vegetative organ of a plant?

Root Signup and view all the answers

In a diheterozygous organism with non-allelic non-linked genes, what is the probability of obtaining gametes with both recessive alleles?

1/16 Signup and view all the answers

What is the primary function of a root in a plant?

Nutrient absorption Signup and view all the answers

Which of the following is NOT true about acidic oxides?

They are often solid at room temperature. Signup and view all the answers

Which animal listed is not considered a parasite?

Milk planaria Signup and view all the answers

What anatomical structure does the Eustachian tube connect?

Pharynx and middle ear Signup and view all the answers

In which of the following compounds is the central atom hybridized as sp²?

BH₃ Signup and view all the answers

Which statement about alkenes and cycloalkanes is correct?

Alkenes are isomeric with cycloalkanes. Signup and view all the answers

What is considered an idioadaptation?

Protective coloration in animals Signup and view all the answers

What class do dog ticks and taiga ticks belong to?

Arachnids Signup and view all the answers

What blood types can a child have if both parents possess the IV (AB) blood group?

A(II), B(III), AB(IV) Signup and view all the answers

At a temperature of 80°C, what is the rate of the reaction in moles per liter per second?

81 mole/(l·sec) Signup and view all the answers

At what temperature does the rate become 3 mole/(l·sec) with a temperature coefficient of 3?

50 Signup and view all the answers

What is the product of the reaction between toluene and bromine under UV light?

benzyl bromide Signup and view all the answers

Which of the following diseases is caused by a virus?

Ebola fever Signup and view all the answers

Which phylum in the Animal Kingdom has the highest species diversity?

Arthropoda Signup and view all the answers

What function do rods in the retina primarily serve?

Brightness and black-and-white vision Signup and view all the answers

Which ions are involved in the reaction when AgNO3 is added to KCl solution?

Ag+ and Cl− Signup and view all the answers

Which pairs of oxides react with water among the following: SiO2, Al2O3, NO, P2O5, ZnO, CaO?

P2O5 and CaO Signup and view all the answers

What is the sequence of evolution of plants?

Bryophytes, Pteridophytes, Gymnosperms, Angiosperms Signup and view all the answers

Which chambers of the heart are found on the right side?

Right atrium and right ventricle Signup and view all the answers

Which of the following vessels is associated with the left chambers of the heart?

Aorta Signup and view all the answers

What type of blood does the inferior vena cava carry?

Oxygen-poor blood Signup and view all the answers

Which structure is NOT part of the systemic circulation?

Pulmonary arteries Signup and view all the answers

The pulmonary veins carry what type of blood to the heart?

Oxygenated blood Signup and view all the answers

What effect does a temperature increase over 38°C have on appetite?

Reduces appetite Signup and view all the answers

Which of the following organs is affected by an increase in temperature, leading to potential digestive disorders?

Stomach Signup and view all the answers

What is a common digestive disorder associated with an increase in body temperature?

Diarrhea Signup and view all the answers

What happens to the activity of digestive enzymes as body temperature increases?

Enzyme activity decreases until it disappears Signup and view all the answers

What structural change affects the enzyme's conformation due to increasing body temperature?

Denaturation of the polypeptide chain Signup and view all the answers

Why does the change in the enzyme's structure lead to a loss of its catalytic ability?

The enzyme cannot bind to substrate anymore Signup and view all the answers

Under which physiological condition is the catalytic center of an enzyme properly formed?

At 37°C Signup and view all the answers

What factor leads to a change in the enzyme's ability to catalyze reactions at increased temperatures?

Alteration of the catalytic center's structure Signup and view all the answers

Which of the following is the correct order of plant classification from simplest to most complex?

Algae, Mosses, Ferns, Gymnospermae, Flowering plants Signup and view all the answers

Which substances can α-amylase break down?

Glycogen and starch Signup and view all the answers

Which organisms possess a cell wall?

Fungi and bacteria Signup and view all the answers

Which of the following statements about immunity is true?

Macrophages are examples of antigen-presenting cells. Signup and view all the answers

To prepare a 0.5 M solution of sulfuric acid, how much of a 96% solution would be needed?

28.48 ml Signup and view all the answers

What components are found in the sperm cells of organisms?

DNA and mitochondria Signup and view all the answers

Which of these statements is true regarding plant life?

Gymnospermae do not produce flowers. Signup and view all the answers

Which of the following are characteristics of innate immunity?

Physical barriers like skin Signup and view all the answers

Study Notes

Clinical Medicine and Public Health: Open Doors Sample Tasks

Task Types: 33 tasks, encompassing 20 entry-level tasks (0-1 point each), 10 intermediate-level tasks (0-5 points each) and 3 advanced tasks (0-10 points each; constructed response).
Evaluation: Correct answers are highlighted in the tasks, with specific criteria & standard answers provided for advanced tasks.

Pharmacology

Task 1: Identify the element with 2 unpaired electrons in its ground state (Cl, Ba, Si, P)
- Correct answer: Si.
Task 2: Choose the series containing only acidic oxides (CO2, SiO2, N2O, SO3; V2O5, CrO3, TeO3, Mn2O7; P2O3; Al2O3, N2O5; SO2; CaO, CO, P2O5, NO2)
- Correct answer: V2O5, CrO3, TeO3, Mn2O7.
Task 3: Calculate the number of structural isomers possible for C3H8O
- Correct answer: 3.
Task 4: Identify the subclass of the compound structure shown (glycerophospholipids).
Task 5: Select the vegetative organ of a plant
- Correct answer: root.

Dentistry, Oral Surgery & Medicine

Task 6: Calculate the probability of a diheterozygote with both recessive alleles, if the genes are not linked
- Correct answer: 25%.
Task 7: Identify the animal that is not a parasite (Milk planaria).

General and Internal Medicine

Task 8: Eustachian tube connects the pharynx and middle ear.
Task 9: Identify the compound with sp² hybridization for the central atom (BH3)
Task 10: Alkenes are isomeric with cycloalkanes.
Task 11: Idioadaptation is the appearance of the flower.

Task 12-19: Additional Questions

Task 12: Dog tick and taiga tick belong to the class Arachnids.
Task 13: Both parents IV(AB) blood group can have a child with blood group A(II), B (III), AB (IV).
Task 14: Temperature coefficient for a rate of reaction is 3, at 80 °C (rate = 81) then 50 °C (rate = 3).
Task 15: Bromination of toluene under UV light yields p-bromotolune.
Task 16: Ebola fever is a viral disease.
Task 17: Arthropoda phylum has the highest number of species.
Task 18: Rods provide black-and-white vision and brightness.
Task 19: AgNO3 and KCl reaction results in Ag+(cations) and Cl- (anions) reaction.

Task 20-30: Advanced Questions

Task 20: SiO2 and P2O5 react with water.
Task 21: Correct plant evolution sequence: Algae, Mosses, Ferns, Gymnospermae, Flowering plants.
Task 22: α-amylase breaks down glycogen and starch.
Task 23: Organisms with cell walls include Ferns.
Task 24: Correct statements about immunity, including innate and acquired types.
Task 25: Volume of 96% sulfuric acid for 0.5M 1.2-liter solution: 33.29 ml.
Task 26: Sperm cells contain different sex chromosomes, identical sets of autosomes, and homologous chromosomes.
Task 27: Details about thermal decomposition of salts.
Task 28: Glycogen does not contain L-glucose, L-fructose, D-xylose, D-galactose.
Task 29: Chordata characteristics include triploblasty, secondary body cavity(coelom), deuterostomia, bilateral symmetry, and an internal skeleton.
Task 30: Oxidation of alkene with permanganate (C5H8) yields 2-pentanone.

High Level Questions (Task 31 & Task 32)

Task 31: Family history analysis suggests X-linked dominant inheritance; calculation of the probability of a left-handed affected child.
Task 32: Identify the phylum and class of a parasitic worm, the way the disease spreads, and features of the organism’s parasitic adaptation.
- Features include attachment organs (hooks and suckers), simplification or reduction of the gut & digestive system, absence of sensory organs (etc).

Additional High-Level Question (Task 33)

Task 33: Loss of appetite and digestive issues with a fever can result from a decrease in enzyme activity and a denaturation of digestive enzymes..

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Description

Test your knowledge on biology and chemistry concepts with this quiz. Questions cover topics such as chemical elements, oxides, structural isomers, and plant organ functions. Perfect for high school or introductory college courses.