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Guide for HSC Biology Practice Test

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Quiz

1/10
Biotechnology
During a polymerase chain reaction, the stage in which hydrogen bonds between complementary DNA strands are broken is called ________.
Select the answer
1 correct answer
A.
annealing
B.
extension
C.
denaturation
D.
ligation

Quiz

2/10
Cell and Molecular Biology
During DNA replication, the enzyme that builds a new strand by adding complementary nucleotides to the exposed 3′ end is ________.
Select the answer
1 correct answer
A.
DNA polymerase
B.
DNA ligase
C.
Helicase
D.
RNA polymerase

Quiz

3/10
Ecology and Environment
Complete the sentence: In an ecosystem, energy transfer between trophic levels is inefficient mainly because energy is
Select the answer
1 correct answer
A.
lost as heat during cellular respiration and used in life processes
B.
destroyed when organisms are consumed by predators
C.
converted entirely into chemical energy in decomposers
D.
returned to producers through the carbon cycle

Quiz

4/10
Evolution
Complete the sentence: In a population of bacteria exposed repeatedly to an antibiotic, resistance becomes more common because
Select the answer
1 correct answer
A.
the antibiotic causes every bacterial cell to develop resistance when it is needed
B.
resistant bacteria deliberately produce mutations in response to the antibiotic
C.
bacteria with pre-existing resistance survive and reproduce more successfully than susceptible bacteria
D.
the antibiotic strengthens the DNA of all surviving bacteria so that resistance is inherited

Quiz

5/10
Human Health and Diseases
Sentence completion: A vaccine protects an individual primarily by
Select the answer
1 correct answer
A.
destroying every pathogen before it enters the body
B.
transferring antibiotics directly into the bloodstream
C.
stimulating immunological memory against a specific antigen
D.
preventing all mutations in infectious microorganisms

Quiz

6/10
Human Physiology
During thermoregulation, a rise in core body temperature is detected by thermoreceptors, leading to responses that reduce temperature. This process is an example of ______.
Select the answer
1 correct answer
A.
positive feedback maintaining a change away from the set point
B.
feedforward control that prevents all temperature variation
C.
negative feedback restoring conditions towards the set point
D.
diffusion of heat directly through the endocrine system

Quiz

7/10
Molecular Genetics
Complete the sentence: During transcription, the DNA template strand is used to produce a complementary strand of ______.
Select the answer
1 correct answer
A.
messenger RNA
B.
transfer RNA only
C.
polypeptide chain
D.
double-stranded DNA

Quiz

8/10
Plant Physiology
Complete the sentence: During daylight, stomata generally open when guard cells...
Select the answer
1 correct answer
A.
actively accumulate potassium ions, lowering their water potential so water enters and increases turgor
B.
actively pump water out, causing the guard cells to become flaccid
C.
stop cellular respiration, preventing carbon dioxide from entering the leaf
D.
lose chlorophyll, which directly widens the stomatal pore

Quiz

9/10
Principles of Inheritance
Complete the sentence: During meiosis, the principle of segregation states that
Select the answer
1 correct answer
A.
the two alleles of a gene separate so that each gamete receives one allele
B.
dominant alleles separate from recessive alleles during DNA replication
C.
all genes on the same chromosome are inherited together without exception
D.
each gamete receives two copies of every allele present in the parent

Quiz

10/10
Reproduction in Organisms
During sexual reproduction, the fusion of gametes produces offspring that generally show ______ because their genetic material comes from two parents.
Select the answer
1 correct answer
A.
greater genetic variation within the offspring population
B.
genetic material identical to that of one parent
C.
no variation unless a mutation occurs
D.
only phenotypic variation caused by environmental conditions
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Info quiz:

  • Quiz name:HSC Biology Practice Test
  • Total number of questions:30
  • Number of questions for the test:100
  • Pass score:70%
  • Number of topics:10 Topics
Study topics:Number of questions:
  • Biotechnology:3 Questions
  • Cell and Molecular Biology:3 Questions
  • Ecology and Environment:3 Questions
  • Evolution:3 Questions
  • Human Health and Diseases:3 Questions
  • Human Physiology:3 Questions
  • Molecular Genetics:3 Questions
  • Plant Physiology:3 Questions
  • Principles of Inheritance:3 Questions
  • Reproduction in Organisms:3 Questions

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