MDCAT BIOLOGY FLP-21 (SMART INSTITUTE)
MDCAT Biology Quiz FLP-21
Test your knowledge with our engaging MDCAT Biology Quiz. Designed specifically for aspiring medical students, this quiz covers essential topics in biology, ensuring a comprehensive review of fundamental concepts.
Key Features:
- Multiple choice questions to assess your understanding
- Covering various biological domains such as genetics, anatomy, and physiology
- Instant feedback on your performance
1-Chlorophylls are found embedded in the ...... membranes
Stroma
Grana
Thylakoid
Intergrana
2-A surfactant is essential for
Efficient gas exchange
Maintaining structural integrity of alveoli
Both
None
3-The inherited instructions an organism carries within its genome is it's
Phenotype
Clone
Recombination
Genotype
4-Monosynaptic reflex consists of
One sensory neuron only
One motor neuron only
Two neurons, one sensory neuron and one motor neuron
None
5-The brain is protected by
Sacrum
Cranium
Humerus
Scapula
6-A chemical component that is NOT found in all viruses is
Protein
Lipids
DNA
RNA
7-In photosynthetic dark reaction, is called so because
It occurs in dark
It does not require light energy
It cannot occur during daytime
It occurs more rapidly at night
8-Gametes in animals are produced by
Mitosis
Meiosis
Fission
All
9-What is the strengthening material of the prokaryotic cell wall?
Cellulose
Chitin
Silica waxes and lignin
Peptidoglycan or murein
10-Which of the following plays the major role in providing support to young herbaceous parts of the plant?
Higher turgor pressure
Cortex and pith with higher turgor pressure
Collenchyma cells
All of these
11-The phage that is involved in the lysogenic cycle of a bacteriophage is known is
lytic phage
Lysogenic phage
Prophage
Bacteriophage
12-Which of the following statement is incorrect regarding germ theory of disease postulated by Robert Koch?
A specific organism can always be found in association with a given disease
The organism can be isolated and grown in pure culture in the laboratories
It is possible to recover the organism in pure culture from the experimentally infected animals
The pure culture cannot produce the disease when inoculated into susceptible animal
13-Lack of symmetry is identified in which group of animals?
Protozoa
Porozoa
Parazoa
Coelomates
14-The end or complete stop of menstrual cycle is called
Ovulation
Menstruation
Fertilization
Menopause
15-The type of plastids found in roots of plants ............
Chloroplasts
Chromoplasts
Leucoplasts
All
16-To overcome infertility, which technique is used
In-vitro fertilization
In-vivo fertilization
Both
None
17-How the HIV is transmitted?
Sexual contact
Blood
Breast feeding
All of the above
18-Which is an organelle that helps the sperm to penetrate the ovum?
Megalis
Zona pellucida
Acrosome
Both a and b
19-Which system is present in nematodes?
Sac-like digestive system
Circulatory system
Respiratory system
Tube like digestive system
20-Which of the following is an example of deep reflexes?
Ankle jerk
Knee jerk
Abdominal reflex
Both a and b
21-Active form an enzyme
Coenzyme
Apoenzyme
Proenzyme
Holoenzyme
22-WOF is not the characteristic of mitochondria?
It contains F1 particles
It is involved in the synthesis of protein
Number of mitochondria is constant
It is self-replicating organelle
23-In what year was the first person vaccinated by Edward Jenner?
1876
1796
1696
1850
24-The organisms able to use sunlight directly as a source of energy are?
Plants
Animals
Fungi
Omnivores
25-The animal is derived from what word?
Aname
Anemia
Anima
None of these
26-WOF is not found in series protosomia
Annelida
Arthropoda
Mollusca
Echinodermata
27-Lymph masses are present in the walls of
Digestive tract
Mucosa
Sub-mucosa
All of these
28-What is the specialized organelle in muscle cells that serves to sequester calcium
T-tubule
Sarcolemma
Sarcomere
Sarcoplasmic reticulum
29-In competitive inhibition, the quality which remains same as the reaction proceed is
Vmax
Km
Ko
Vo
30-One of the functions of Neuroglial cells is to protect and support which of the following?
Nephrons
Myoid cells
Neurons
None of these
31-The selection for a trait on one extreme is called as
Directional selection
Natural selection
Stabilizing selection
All of these
32-The space between two Z-lines constitutes the:
Sarcolemma
Sarcoplasm
Sarcophagus
Sarcomere
33-Closely circulatory system is present in which group of invertebrates
Arthropods
Gastopods
Aves
Annelids
34-What is not true about human lungs
They are opened sacs
They are closed sacs
They are spongy in nature
They are placed in chest cavity
35-Intercostal muscles are found in
Ribs
Pharynx
Lung
Both b and c
36-Which of the following is true regarding a test cross?
The traits of a test cross are homozygous dominant
Test cross can only be used for monohybrid and dihybrid crosses
It is a tool used by researchers to determine the genotype of earlier generations
Both a and b
37-Why cannot viruses replicate on their own?
Too small
Have no cell wall
Lack metabolic machinery
All
38-How many actin filaments surround each myosin filament?
2
4
6
8
39-A man with blood group "A" marries a woman of blood group "B". Both are heterozygous. What is the offsprings having phenotype "O"
10 %
25 %
50 %
75 %
40-What is meant by optimum temperature of an enzyme?
The temperature at which the primary structure of an enzyme remains intact
The temperature at which the an enzyme makes the maximum amount of product
The temperature at which an enzyme may be more affected by an inhibitor
The temperature at which an enzyme makes the least amount of product
41-Bacteriochlorophylls does not include WOF
Chlorophyll e
Chlorophyll b
Chlorophyll c
All of these
42-Where does the ovum receive the sperm?
Animal pole
Vegetal pole
Both a and b
None of these
43-Glycogen is present in all body except
Brain
Heart
Blood
Tissues
44-Air enters the nasal cavity through
Lungs
Trachea
Bronchi
Nostrils
45-WOF components of an animal cell would NOT also be observed in a bacterial cell?
Nucleus
Cell membrane
Ribosomes
DNA
46-Fatty acids move through the plasma membrane by which transport method?
Passive transport
Active transport
Facilitated transport
Non-facilitated transport
47-Midbrain is also known as
Pons
Medulla
Mesencephalon
None of these
48-Hemophilia is a sex-linked recessive disease. A mother that is a carrier for the disease mates with a healthy male. WOF statements is true?
The daughter are just as like to be hemophilic as the sons
50 % of the daughters will have hemophilia
None of the children will have hemophilia, because the mother is only a carrier
50 % of the sons will have hemophilia
49-Cartilage has living cells that are called
Osteocytes
Osteoclasts
Chondrocytes
Osteoblasts
50-Homology means
Similarly in characteristics resulting from common ancestors
Similarity in function from acquired characteristics
Study of similar organs but with different functions
Study of similar organs but with different functions
51-In alkaline medium, amino acids carry negative charge and act as
Acid
Base
Neutral
None of these
52-Enzymes are globular proteins because
They have a primary structure
They have a secondary structure
They have a tertiary structure
All of these
53-The best function of coelom is described as
To increase the size of the animal
To help in the functioning of reproductive system
To provide space for the development of organs and system
All of these
54-Mating between the relative is called
Ex-breeding
Breeding
In-breeding
Outbreeding
55-WOF proteins directly interacts with the myosin-binding site on actin?
Tropomyosin
Troponin
Both a and b
None of these
56-The light reaction takes place in?
Chloroplast
Grana
Thylakoid
Stroma
57-The ability to pass on genes is defined as
Differential reproduction
Evolution
Natural selection
Fitness
58-What is true for pill and flagella like structures of bacteria:
Both are same in size
Both help in movement
Both are composed of proteins
All of the above
59-Synaptic vesicles discharge which hormone at the neuromuscular junction?
Acetylcholine
Adrenaline
Estradiol
Testosterone
60-The non substrate molecules that binds to the allosteric sites are called?
Inhibitors
Reactants
Allosteric substrates
Allosteric modulators
61-In sexual reproduction, plants have diplohaplontic life cycle with alternating
Haploid sporophyte and diploid gametophyte generations
Diploid sporophyte and diploid gametophyte generations
Haploid sporophyte and haploid gametophyte generations
Diploid sporophyte and gametophyte generations
62-In which of the following component of the body, lactic acid fermentation takes place?
Heart
Muscles
Liver
Brain
63-Which of the following would best determine the fitness of an organism?
The number of offspring produced by the organism
How much food the organism consumes in its lifetime
How much food the organism consumes in its lifetime
The number of offspring produced by the organism's own offspring
64-External male genitalia are
A pair of testes
Seminipherous tublules
Male copulatory organ
Both a and c
65-Stomat cover only what portion of the leaf surface?
10 %
50 %
1-2 %
0.3-0.4 %
66-Mad cow disease is caused by which of the following?
Prion
Virus
Bacteria
Both a and b
67-Somatic cells of humans have how many pairs of chromosomes in total?
10
23
24
48
68-The ultimate source of all the change is?
Migration
Mutation
Genetic drift
Selection
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