SCIENCE 10
THIRD QUARTER EXAMINATION
Name:__________________________________________________________Date:_______________ Score:__________
I.
Multiple Choice: Choose the letter of the correct answer. Write your answer on the blank provided.
__________1. What is the correct sequence of relaying information or impulse from a perceived stimulus to the
brain and returning back the instructed response?
i.
motor neuron
iii. receptor
v. effector like muscle or organ
ii.
sensory neuron
iv. brain
A. i, ii, iii, iv, v
B. ii, iii, iv, i, v
C. iii, ii, iv, i, v
D. iii, ii, i, iv, v
__________2. Endocrine glands release hormones into the body in controlling and regulating various metabolic
processes including growth and development. Among the endocrine glands listed below, which
does not match with its function?
A. pancreas: secretes insulin that regulates blood sugar levels
B. ovaries: secrete progesterone and estrogen to promote pregnancy
C. pituitary glands: secretes calcitonin that causes storage of calcium in the bones
D. thymus: secretes thymosin which enables the body to produce certain antibodies
__________3. Which of the following part-function pair is correct?
A. testis – sperm production
C. vas deferens - seminal fluid secretion
B. penis – storing of mature sperms
D. scrotum – secretion of male hormones
__________4. _________ produces eggs while_________receives the sperm during sexual intercourse, then
sperm passes through the _________and fertilizes the egg in the _________.
I. Ovary
II. Vagina
III. Uterus
IV. Fallopian tube
A. I, II, III, IV
B. I, III, II, IV
C. I, IV, II, III
D. I, III, IV, II
__________5. What endocrine gland has control over the function of testes and ovaries?
A. hypothalamus
B. pituitary gland
C. reproductive glands D. thyroid gland
__________6. Menstrual cycle is controlled by several hormones. Which of the following events correctly
describes the role of hormone/s?
A.Pituitary gland controls and starts the menstrual cycle by releasing estrogen.
B. A sudden surge of FHS facilitates the maturation of follicle leading to ovulation.
C. Estrogen together with progesterone help increase the thickness uterine lining.
D. Progesterone secretion happens before ovulation to control the secretion of LH.
__________7. The two endocrine glands that produce substances that develop reproductive organs are:
A. testes and ovaries
C. pituitary and thyroid
B. testosterone and estrogen
D. adrenal and pancreas
__________8. This hormone is responsible for initiating follicle maturation, converting follicles into corpus luteum
and causing progesterone secretion.
A. LH
B. FSH
C. estrogen
D. Progesterone
__________9. The release of FSH by anterior pituitary gland will stimulates the ovaries to release __________
while over production of estrogen will prevent the further production of _______.
A. Estrogen: FSH
C. Progesterone: LH
B. Estrogen: progesterone
D. Progesterone: FHS
__________ 10. What might happen to a person if his nervous and endocrine systems fail to maintain
homeostasis?
A. The person will die.
C. The person suffers abnormalities and diseases.
B. The person will have metabolic disorders. D. All of the above
__________ 11. How do glucagon and insulin of the pancreas control the blood sugar level in the human body?
I. In state of high sugar concentration in the blood, pancreas will produce glucagon.
II. In state of low sugar concentration in the blood, pancreas will produce both glucagon and insulin.
A. I only
B. II only
C. both I & II
D. neither I nor II
__________12. Both endocrine and nervous systems control and regulate body processes to maintain
homeostasis. How do the two systems differ in their actions?
A. In controlling body process, endocrine system utilizes different glands that secrete hormones while nervous system
utilizes neurons to send or carry impulses.
B. Endocrine system uses electrical signals that travel through blood slowly and produces notable effects in the target
organ while nervous system uses chemical signals that travel so fast.
C. Both A and B
D. Neither A nor B
__________13. Is there coordination between nervous system and endocrine system to make fertilization and pregnancy
possible in human being?
A. No, it’s purely nervous function because it controls sensation and arousal of feelings triggering human desire to do sexual
intercourse and fertilization is matter of a consequential effect.
B. No, it’s purely an endocrine function. The hormones that both male and female sexual organs produce ensure the
feelings, sensation, and urge including all preparation for fertilization to occur.
C. Yes, both systems coordinate to ensure all basic preparations. The brain processes physical stimulation while sex glands
produce hormones necessary for reproduction.
D. There is insufficient data to conclude that there is coordination or no coordination between the two systems.
__________14. What is the role of DNA and RNA in protein synthesis?
A. DNA acts as the blue print for protein production while RNA copies and builds proteins.
B. DNA carries the information in the cytoplasm and decoded by RNA to produce proteins.
C. RNA has the genetic code that directs the formation of DNA to facilitate protein production.
D. DNA directs the production proteins while RNA assists the DNA in the translation of proteins.
__________15. Which of the following is NOT a correct comparison between DNA and RNA?
A. RNA has single strand while DNA has a double helix strand.
B. The adenine of RNA pairs with uracil while in DNA, it pairs with thymine.
C. RNA is made up of proteins while DNA is made up of nucleotides.
D. RNA is composed of phosphate, ribose sugar and N-bases while DNA is composed of phosphate, deoxyribose sugar
and N-bases.
__________16. The sequence of bases in one DNA strand is given below. Identify the complementary sequence of bases in the
other strand of DNA.
A. UUGGGACUCAGA
C. TTGGGACTCAGA
B. TTGGGUCTCUGU
D. TTGGGUCTCUGU
__________17. What processes are involved in protein synthesis?
A. replication and translation
C. Transcription and translation
B. replication and transcription
D. Replication, transcription, &translation
For 18-20. The following is the base sequence on one strand of a DNA molecule:
AATGCCAGTGGT
__________18.
If this strand is replicated, which of the following is the complementary strand that is produced?
A. T C G T C C G T C T A G
C. T T A C G G T C A C C A
B. A G C A G G C A G G G T
D. U C G U C C U C U A G A
__________19. If transcribed into an mRNA, what would be the resulting strand?
A. U U A C G G U C A C CA
C. A G C A G G C A G A U C
B. A G C A G G A G A T C
D. T C G T C C G T C T A G
__________20. During translation, the tRNA sequence of nucleotides arranged linearly is _________.
A. T C G T C C G T C T A G
C. A G C A G G C A G A U C
B. A A U G C C A G U G G U
D. U C G U C C G U C U A G
II.
Compare DNA and RNA by filling up the table below ( 1 point each )
Basis of comparison
DNA
RNA
Number of strands
Location in the cell
Type of sugar
Nitrogenous base pair
III.
Match each gland in column A with its corresponding function in column B. ( 1 point each )
________1. Thymus
a. Stimulates growth, and controls the functions of other glands
________2. Pancreas
b. Controls the calcium levels in your body, and normalizes bone growth
________3. Adrenal
c. Regulates body metabolism, and causes storage of calcium in bones
________4. Thyroid
d. enables the body to produce certain antibodies
________5. Parathyroid
e. Prepares the body for action, and controls the heart rate and breathing
________6. Pituitary
in times of emergency
________7. Testis
f. controls maturation and male characteristics
________8. Ovaries
g. Regulates blood sugar levels
h. influence female traits and support reproductive function
IV. True/ False: Write TRUE if the statement is correct and False if otherwise.
______1. The brain is the control center of the nervous system.
______2. The endocrine system is responsible for producing hormones.
______3. Neurons are the basic building blocks of the endocrine system.
______4. The pituitary gland is often called the "master gland" of the body.
______5. Adrenaline is a hormone released by the adrenal glands during stress or excitement.
______6. DNA contains the sugar ribose while RNA contains the sugar deoxyribose.
______7. DNA is typically double-stranded while RNA is typically single-stranded.
______8. DNA is found in the cytoplasm of eukaryotic cells.
______9. RNA is involved in protein synthesis.
______10. DNA can be found in the nucleus and mitochondria.
______11. DNA stands for Deoxyribonucleic Acid.
______12. RNA stands for Ribonucleic Acid.
______13. Nitrogenous base pairs are held together by hydrogen bonds.
______14. Base pairing is crucial for the replication of DNA.
______15. In DNA, the nitrogenous base pairs form the rungs of the double helix ladder.