MDCAT BIOLOGY FLP-25 (SMART INSTITUTE)
MDCAT Biology Challenge
Test your knowledge with our comprehensive MDCAT Biology quiz designed specifically for aspiring medical professionals. This engaging quiz consists of 66 multiple-choice questions covering various topics in biology, ensuring an in-depth review of essential concepts.
Key Features:
- 66 diverse questions
- Instant feedback on answers
- Improve your understanding of biology for MDCAT
1-Choose the region /s of spinal cord:
Cervical
Thoracic
Lumbar
All of these
2-Which of the following is not the function of endoplasmic reticulum?
Transport of material
Mechanical support
Synthesis of conjugated molecules
All of these
3-Centipedes belong to class ........of arthropoda.
Arachnida
Insecta
Cephalopoda
Myriapoda
4-What is the strengthening material of the prokaryotic cell wall?
Cellulose
Chitin
Silica waxes and lignin
Peptidoglycan or murein
5-Which one is not the characteristic of kingdom animalia?
All animals are ingestive heterotrophs
All animals are eukaryotes
It is largest kingdom
All animals develop from the dissimilar gametes
6-Sperms of liverworts, mosses, ferns move towards archegonia, in response to nucleic acid released by the ovum. This is an example of?
Chemotropic movement
Chemonastic movement
Haptonastic movement
Chemotactic movement
7-Adaptation of traits to better fill a niche is known as which of the following?
Polymorphism
Gene linkage
Specialization
Replication
8-Cocobacillus has a large shape similar to which of the following?
Egg
Rod
Ball
None of these
9-Compound microscope was first used by
A.V Leeuwenhoek
Pasteur
Jansen and Hans
None of these
10-Nicotinamide adenine dinucleotide is an example of
Coenzyme
Holoenzyme
Apoenzyme
Co-factor
11-The loss of liquid via hydathodes is called
Ascent of sap
Plasmolysis
Imbibition
Guttation
12-Herpes simplex is caused by which virus?
Adenovirus
Influenza virus
Pox virus
Herpes virus
13-Two species can avoid competition, and better use the environment's resources by occupying different?
Adaptations
Polymorphism
Niches
Specialization
14-Glycolysis takes place in
Nucleus
Cytosol
Mitochondria
Ribosomes
15-The pleural membrane cover which organ?
Kidney
Heart
Brain
Lungs
16-Which method is of asexual reproduction?
Sporulation
Fission
Apomixis
All of these
17-Out of 31 pairs of spinal nerves, how many pairs of coccygeal nerves are there?
1
5
10
12
18-What is the major cell infected by the AIDS HIV Virus?
B lymphocyte
T lymphocyte
Cancer cells
Stem cells
19-Enzymes that are integral part of ribosomes are involved in the synthesis of which of the following molecules?
Lipids
Proteins
Carbs
All of these
20-Skin color in man is controlled by how many pairs of genes?
1
2
3
None of these
21-Embryo of a molecule, mouse and human show
Comparative embryology
Distinct differences
Vestigial organs
Analogous structure
22-Monosynaptic refers to the presence of how many chemical synapse/s?
1
2
3
4
23-Glycogen is how glucose is stored in the human body. Where is it most abundantly found?
Liver
Muscles
Kidneys
Both liver and muscles
24-Catalysts that increase the rate of biological chemical reaction are called?
Proteins
Vitamins
Enzymes
Minerals
25-The optimal pH in which the enzyme kinase functions is?
1.5
3.5
5.5
7.5
26-The disease characterized by the breakdown of alveoli is called
Asthma
Tuberculosis
Emphysema
A and b
27-The dorsal root of spinal cord is
Sensory
Motors
Mixed
All of these
28-Darwin's theory of evolution by natural selection is based on all of the following postulates except?
Some individuals are more successful in surviving and reproduction than others
Individuals within a population are variable
The survival and reproduction of individuals is not random
The survival and reproduction of individuals is random
29-Most multicellular organisms are which of the following?
Haploid
Diploid
Single nucleus
None of these
30-A plant cell wall is mainly composed of which of the following?
Protein
Lipid
Cellulose
Starch
31-What is the definition of "fitness" in terms of evolution?
The organism's ability to attain resources while in competition with other organisms of its species
The organism's ability to attract the most mates
The organism's health
The ability of an organism to contribute its genes to future generations
32-Which of the following statements is correct distinction between autotrophs and heterotrophs
Only heterotrophs require chemical compounds from the environment
Cellular respiration is unique to heterophs
Only heterotrophs have mitochondria
Autotrophs but not heterotrophs can nurish themselves begining with nutrients that are entirely inorganic
33-The fluid mosaic model of plasma membrane proposes that membranes are
Solid
Semi-solid
Fluid
Liquid
34-A gene pool is distributed by which of the following?
Emigration
Immigration
Pan migration
Both emi and immigration
35-Which cells secrete pepsinogen?
Mucous
Bacterial
Zymogen
Oxyntic
36-How does the electron transport system generate ATP
Symbiosis
Chemiosmosis
Both a and b
None of these
37-Which of these processes is the means by which a bacteria can directly update and incorporate foreign DNA from the environment into its genome?
Transduction
Transformation
Binary fission
Conjugate
38-Glottis is lined with
Plasma membrane
Mucous membrane
Meninges
Epithelial membranes
39-An insulin molecule is made up of how many polypeptide chains?
4
2
3
2
40-Which product is formed when carbon dioxide combines with amino group of haemoglobin?
Carboxyhaemoglobin
Plasma proteins
Bicarbonate ions
Histamines
41-According to lock and key model the substrate acts as a?
Lock
Key
Both a and b
None of these
42-How many thin filaments are arrayed around each thick filament within a sarcomere?
2
4
6
8
43-The functional parts of forebrain are
Thalamus and limbic system
Cerebrum, limbic system and thalamus
Thalamus and cerebrum
Cerebrum and limbic system
44-Which of the following is NOT a function of smooth endoplasmic reticulum ?
Synthesis of steroid hormone from cholesterol
Detoxification of human drugs
Synthesis of phospholipids for plasma membrane
Synthesis of membrane proteins
45-Which of the statements correctly describes why ions are unable to cross the plasma membrane without channel proteins?
They are unable to cross the hydrophilic phosphate heads of the lipid bilayer
They are unable to cross the hydrophobic tails of the lipid bilayer
They are unable to cross both the phosphate heads and fatty acid chains of the lipid bilayer
They are too big to cross the plasma membrane
46-Identify the characteristic of acoelomates?
Absence of mesoderm
Absence of brain
Coelom that is incompletely lined with a mesoderm
Solid body without a cavitysurrounding internal organs
47-Nervous system of nematodes consists of which of the following?
Ventral nerve cord
Dorsal nerve cord
Lateral nerve cord
All of these
48-Examples of bacteria requiring low concentration of oxygen is?
Spirochete
E.coli
Pseudomonas
Campylobacter
49-Which among the following is a diploblastic organism?
Hydra
Crabs
Squid
Earthworm
50-After fertilization the zygote increases in size and travels down the fallopian tube to become embedded in the walls of the womb,. This process is called
Ovulation
Conception
Implantation
Menstruation
51-Inheritance in man is traced by which of the following?
Mathematical method
Statistical method
Genetic method
Pedigree method
52-The main unit of the thick filament is
Myofibril
Z-line
Myosin
Actin
53-All of the following are the current preventive methods of HIV infection, except?
Safe and protected lifestyle
Use of sterile injections and needles
Use of sterile injections and needles
Use of available vaccines
54-The hinge joint and ball and socket joints are the types of
Freely movable joints
Slightly movable joints
Immovable joints
None of these
55-For attachment, rabies virus binds to a
Complement receptor
Integrin ICAM-1
Acetylcholine
Epidermal growth factor
56-Which of these is a characteristic of prokaryotic cells?
Absence of cell organelles
Absence of nucleus
Presence of 70S ribosomes
All of these
57-A common polyhedral capsid shape of virus is a
Pentagon
Cube
Icosahedral
Pyramid
58-Which of the following is NOT characteristic feature of tapeworm?
Each body segment has two sets of male and female reproductive organs
The digestive tract develops from endodermal cells in the embryo
The body can be cut into two parts, which are mirror images of each other, in one plane only
None of above
59-HDL synthesized in
Adipose tissue
Liver
Intestine
Liver and intestine
60-In anaerobic respiration only ..... 5 of the energy present within the chemical bond of glucose is converted into ATP
1
2
3
4
61-The event happens in menstrual cycle when level of progesterone declines
Ovulation
Beginning of menses
Corpus luteum formation
Maturation of ovarian follicle
62-Metacarpophalangeal joints are example of
Saddle joint
Condyloid joint
Ball and socket joint
Hinge joint
63-The Urey-Miller experiment determined which of following results?
DNA replicates by semiconservative replication
Cyanobacteria were responsible for the oxygenation of the atmosphere
The early atmosphere was composed of ammonia and methane
Organic molecules can arise from inorganic precursors
64-Growth and development of plant cells is the role of?
Parenchymatous cells
Chlorenchymatous cells
Meristematic cell
Sclerenchymatous cells
65-The composition of brain stem is
Spinal cord, axon, vertebra
Cerebrum, cerebellum, pons
Medulla, pons, midbrain
Cerebrum, thalamus, pons
66-To form a female zygote, the sperm cell must contribute which chromosome?
X
Y
2X
XY
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