G10 3RD Quarter PT
G10 3RD Quarter PT
G10 3RD Quarter PT
Manila
Grade 10 Science
3RD PERIODIC TEST
SY 2019-2020
Multiple Choice. Write the letter of your answer before the number.
1. What is the similarity between DNA and RNA 8. Which of the following is true of evolution?
molecules? Both Evolutionary changes
A. contain uracil A. the ability of a species to survive and
B. are double helix reproduce in a specific environment.
C. contain guanine B. increase the ability of a species to survive
D. have deoxyribose sugar and reproduce under any circumstances.
C. result in a species becoming more and
2. Which of the following is not part of the female more abundant over time.
reproductive system? D. result in animals becoming larger over
A. Cervix B. Epididymis time and having larger numbers of
C. Fallopian tube D. Uterus offspring.
3. Evidence of past life in the form of fossils is 9. DNA is important in understanding living things
found in what form of rock? because DNA is
A. igneous A. a self-replicating molecule
B . sedimentary B. a double stranded molecule
C. metamorphic C. part of the nucleus of the cell
D. crushed metamorphic D. a carrier of genetic information
4. The chemical messengers of the endocrine 10. On a field trip, a scientist finds a fossil of a
system are snub- nosed crocodile and wants to know its
A. enzymes B. hormones age. What would you do to date the fossil?
C. impulses D. RBC A. Measure decay of radioactive isotopes in
the rock around the fossils.
5. Humans have a set of miniature tail bones B. Count the annual rings of trees growing in
which no longer support a tail. On the basis of the area
this structure, with which of the following C. Determine the age by comparing them
organisms do they most likely share a common to fossils in other layers.
ancestor? D. Measure the depth at which the fossils are
1. dog found.
2. bird
3. monkey 11. A couple has difficulty in having a child.
A. 1 and 3 B. 2 and 3 According to their doctor, there is a problem in
C. 1 and 2 D. 1, 2 and 3 ovulation. This means that the problem is in the
A. woman’s ovaries
6. The Giant Crowned fruit bat is the biggest fruit B. man’s testes
bat in the world which is found in Subic and C. man’s penis
Bataan, which of the following is the reason for D. woman’s uterus
it to become endangered?
A. siltation For number 12, refer to the illustration below.
B. loss of habitat
C. mining activities
D. toxic and hazardous waste
For numbers 14- 15, refer to the diagram 21. When the DNA makes a copy of itself, the two
strands unzip or separate, what happens to
the strands afterwards?
A. each synthesizes a new strand
B. both grow to double their length
C. one of the strands makes a copy itself.
D. both arrange themselves to a spiral form
42. Which one of the following is TRUE of both DNA 48. Which of the following is NOT a necessary
and RNA?l component of translation?
A. both contain the base U, uracil A. Anticodon B. mRNA
B. both contain the base T, thymine C. Ligase D. Amino acid
C. both are polymers of nucleotides
D. both are found double stranded in all 49. Ribosomes select the correct tRNAs
living cells A. then bind to the appropriate mRNA
B. solely on the basis of their anticodons
43. In DNA extraction, what does the extraction C. depending on their abundance in the
solution contain? cytosol
A. ethanol D. with the least abundant anticodons
B. ethanol and salt
C. salt and detergent
D. detergent and ethanol
50. After an impulse has been interpreted by the 58. Reflex action is advantageous because it
brain, it will be transmitted to the allows a person to
A. spinal cord and then sent to the bones. A. avoid a harmful stimulus.
B. spinal cord and then sent to the muscles. B. think and respond to stimulus faster.
C. cerebellum and then sent to the spinal C. choose the best action for the stimulus.
Cord. D. respond to stimulus faster without thinking.
D. cerebrum and then sent to the spinal
column.
For number 59- 60, refer to the diagram below.
51. Which sequence of genetic information is
correct?
A. translation – replication – transcription
B. replication – transcription – translation
C. transcription – translation – replication
D. replication – translation – transcription