CNN EXAM 2025 LATEST EXAM REVIEW
WITH COMPLETE QUESTIONS AND
CORRECT ANSWERS|| ACTUAL CNN EXAM
2025 TEST ALREADY RATED A+
Nondisjunction is?
A. Trisomy 21 (95% of all cases): three complete copies in all
cells (frequency increases with increasing maternal age)
B. The failure of homologous chromosomes to properly separate
during either meiosis or mitosis
C. It is believed that the delay in completion of meiosis occurring
later in age is partly responsible (biological mechanics have aged)
D. Are a heterogeneous group of behaviourally defined
Neurodevelopmental Disabilities with various etiologies, but with a
heritability estimate of more than 90%. Correct Answer B
Is the most common form of inherited intellectual disability and
2nd only to Down's as a genetic cause of ID
- Affects 1 in 3,600 males & 1 in 4,000- 6,000 females
- 1 in 260 women and 1 in 800 men are carriers
A. Down Syndrome
B. Autism Spectrum Disorders
C. Neuro-Developmental Disorders (NDD)
D. Fragile X Correct Answer D
Are affected by stressful factors and processes including
development in utero and in childhood, environmental chemicals,
drugs and pharmaceuticals, aging, and diet.
A. Epigenetic mechanisms
,B. Developmental Dyslexia (DD
C. Histone
D. DNA methylation Correct Answer A
Occurs when methyl groups, an epigenetic factor found in some
dietary sources, can tag DNA and activate or repress genes.
A. Epigenetic mechanisms
B. Developmental Dyslexia (DD
C. Histone
D. DNA methylation Correct Answer D
Are proteins around which DNA can wind for compaction and
gene regulation. Histone modification occurs when the binding of
epigenetic factors to histone "tails" alters the extent to which DNA
is wrapped around histones and the availability of genes in the
DNA to be activated.
A. Epigenetic mechanisms
B. Developmental Dyslexia (DD
C. Histone
D. DNA methylation Correct Answer C
Psychoneuroimmunology(PNI) is?
A.Bi-directional CNS-IS communication, Immune system and
response
B. Sickness behaviour, Motivational changes in response to
infection
C. The immune system and psychopathology
D. All of the above Correct Answer D
Proteins released by immune cells which serve as messengers
infection results in the release of ----
, A. Neurons
B. CNS
C. glia
D. Cytokines Correct Answer D
The Cytokine function involves?
A. Network: cytokines are never produced in isolation but as a
range of positive and negative signals for overall regulation
B. Synergy: effects of two cytokines together is greater than the
sum of either alone
C. Antagonism: cytokines which inhibit the action of another (e.g.,
IFN-γ and IL-4; IL-1 and IL-1ra; soluble receptors)
D. All of the above Correct Answer D
The profound behavioural and physiological changes that
accompany almost all infectious diseases be they bacterial, viral,
or fungal in origin.
This is due to the central actions of pro-inflammatory cytokines,
what are the three changes?
A. Fever
B. Anorexia (loss of appetite)
C. Behavioural depression (often manifested as increased sleep)
D. All of the above Correct Answer D
Where set-point may or may not be normal, but actual Tb is
higher than set-point (can occur in response to disease, drugs, or
heat exposure)
A. Hyperthermia
B. Fever
C. Normothermia
D. Hypothermia Correct Answer A
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