Q. Which of the following statements about the light reactions is true?
-
A.
They occur in the stroma
-
B.
They do not require light
-
C.
They produce ATP and NADPH
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D.
They fix carbon dioxide
Solution
The light reactions produce ATP and NADPH, which are used in the Calvin cycle.
Correct Answer: C — They produce ATP and NADPH
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Q. Which of the following statements about the light-dependent reactions is true?
-
A.
They occur in the stroma
-
B.
They produce ATP and NADPH
-
C.
They do not require light
-
D.
They fix carbon dioxide
Solution
The light-dependent reactions produce ATP and NADPH.
Correct Answer: B — They produce ATP and NADPH
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Q. Which of the following statements about the light-independent reactions is true?
-
A.
They require light directly
-
B.
They occur in the thylakoid membranes
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C.
They produce glucose
-
D.
They release oxygen
Solution
The light-independent reactions, also known as the Calvin cycle, produce glucose using ATP and NADPH generated in the light-dependent reactions.
Correct Answer: C — They produce glucose
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Q. Which of the following structures is NOT part of the upper respiratory tract?
-
A.
Nasal cavity
-
B.
Pharynx
-
C.
Larynx
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D.
Bronchi
Solution
The bronchi are part of the lower respiratory tract, while the nasal cavity, pharynx, and larynx are part of the upper respiratory tract.
Correct Answer: D — Bronchi
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Q. Which of the following structures is responsible for gas exchange in mammals?
-
A.
Bronchi
-
B.
Alveoli
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C.
Trachea
-
D.
Lungs
Solution
Alveoli are tiny air sacs in the lungs where gas exchange occurs, allowing oxygen to enter the blood and carbon dioxide to be expelled.
Correct Answer: B — Alveoli
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Q. Which of the following structures is responsible for the exchange of nutrients and waste between the mother and fetus?
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A.
Umbilical cord
-
B.
Amniotic sac
-
C.
Placenta
-
D.
Chorion
Solution
The placenta is responsible for the exchange of nutrients and waste between the mother and fetus.
Correct Answer: C — Placenta
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Q. Which of the following structures is responsible for the production of male gametes in flowering plants?
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A.
Stigma
-
B.
Anther
-
C.
Style
-
D.
Ovary
Solution
The anther is the part of the stamen that produces pollen, which contains male gametes.
Correct Answer: B — Anther
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Q. Which of the following techniques is used to amplify DNA?
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A.
Gel electrophoresis
-
B.
Polymerase chain reaction (PCR)
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C.
Southern blotting
-
D.
Sanger sequencing
Solution
Polymerase chain reaction (PCR) is a technique used to amplify specific DNA sequences, making millions of copies of a particular segment.
Correct Answer: B — Polymerase chain reaction (PCR)
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Q. Which of the following techniques is used to introduce recombinant DNA into a host cell?
-
A.
PCR
-
B.
Transformation
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C.
Gel electrophoresis
-
D.
Cloning
Solution
Transformation is the process of introducing recombinant DNA into a host cell, allowing for expression or replication.
Correct Answer: B — Transformation
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Q. Which of the following techniques is used to separate DNA fragments by size?
-
A.
PCR
-
B.
Gel electrophoresis
-
C.
Cloning
-
D.
DNA sequencing
Solution
Gel electrophoresis is used to separate DNA fragments based on their size.
Correct Answer: B — Gel electrophoresis
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Q. Which of the following tissues is primarily involved in the storage of water in succulent plants?
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A.
Xylem
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B.
Phloem
-
C.
Parenchyma
-
D.
Sclerenchyma
Solution
Parenchyma tissue in succulent plants is specialized for water storage, allowing them to survive in arid conditions.
Correct Answer: C — Parenchyma
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Q. Which of the following tissues is primarily involved in the transport of hormones in plants?
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A.
Xylem
-
B.
Phloem
-
C.
Parenchyma
-
D.
Sclerenchyma
Solution
Phloem is involved in the transport of hormones, nutrients, and other organic compounds throughout the plant.
Correct Answer: B — Phloem
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Q. Which of the following vaccines is a live attenuated vaccine?
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A.
Influenza vaccine
-
B.
MMR (Measles, Mumps, Rubella) vaccine
-
C.
Hepatitis B vaccine
-
D.
Tetanus toxoid vaccine
Solution
The MMR vaccine contains live attenuated viruses that stimulate an immune response without causing the disease.
Correct Answer: B — MMR (Measles, Mumps, Rubella) vaccine
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Q. Which organ is primarily responsible for detoxifying chemicals in the human body?
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A.
Kidney
-
B.
Liver
-
C.
Heart
-
D.
Lungs
Solution
The liver plays a crucial role in detoxifying chemicals and metabolizing drugs.
Correct Answer: B — Liver
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Q. Which organ is primarily responsible for filtering blood in mammals?
-
A.
Liver
-
B.
Heart
-
C.
Kidneys
-
D.
Lungs
Solution
The kidneys are primarily responsible for filtering blood and removing waste products from the body.
Correct Answer: C — Kidneys
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Q. Which organ produces bile that aids in the digestion of fats?
-
A.
Pancreas
-
B.
Liver
-
C.
Gallbladder
-
D.
Stomach
Solution
The liver produces bile, which is stored in the gallbladder and released into the small intestine to help digest fats.
Correct Answer: B — Liver
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Q. Which organ produces bile?
-
A.
Pancreas
-
B.
Liver
-
C.
Gallbladder
-
D.
Stomach
Solution
The liver produces bile, which is stored in the gallbladder and helps in the digestion of fats.
Correct Answer: B — Liver
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Q. Which organelle is involved in the degradation of waste materials in plant cells?
-
A.
Lysosome
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B.
Chloroplast
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C.
Vacuole
-
D.
Mitochondrion
Solution
Lysosomes contain enzymes that break down waste materials and cellular debris in plant cells.
Correct Answer: A — Lysosome
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Q. Which organelle is involved in the detoxification of harmful substances in plant cells?
-
A.
Lysosome
-
B.
Peroxisome
-
C.
Vacuole
-
D.
Chloroplast
Solution
Peroxisomes are involved in the detoxification of harmful substances and the breakdown of fatty acids in plant cells.
Correct Answer: B — Peroxisome
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Q. Which organelle is known as the powerhouse of the cell?
-
A.
Ribosome
-
B.
Mitochondrion
-
C.
Chloroplast
-
D.
Endoplasmic reticulum
Solution
Mitochondria are known as the powerhouse of the cell because they generate ATP through cellular respiration.
Correct Answer: B — Mitochondrion
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Q. Which organelle is primarily responsible for respiration in plant cells?
-
A.
Chloroplast
-
B.
Mitochondria
-
C.
Nucleus
-
D.
Endoplasmic reticulum
Solution
Mitochondria are the organelles responsible for respiration, where energy production occurs.
Correct Answer: B — Mitochondria
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Q. Which part of the brain is responsible for regulating balance and coordination?
-
A.
Cerebrum
-
B.
Cerebellum
-
C.
Brainstem
-
D.
Thalamus
Solution
The cerebellum is responsible for coordinating voluntary movements and maintaining balance.
Correct Answer: B — Cerebellum
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Q. Which part of the brain regulates the rate and depth of breathing?
-
A.
Cerebrum
-
B.
Cerebellum
-
C.
Medulla oblongata
-
D.
Thalamus
Solution
The medulla oblongata controls autonomic functions, including the regulation of breathing patterns.
Correct Answer: C — Medulla oblongata
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Q. Which part of the brain regulates the rate of breathing?
-
A.
Cerebrum
-
B.
Cerebellum
-
C.
Medulla oblongata
-
D.
Thalamus
Solution
The medulla oblongata is responsible for regulating the rate and depth of breathing based on the body's needs.
Correct Answer: C — Medulla oblongata
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Q. Which part of the brain regulates the respiratory rate?
-
A.
Cerebrum
-
B.
Cerebellum
-
C.
Medulla oblongata
-
D.
Thalamus
Solution
The medulla oblongata is the part of the brain that regulates the respiratory rate by responding to carbon dioxide levels in the blood.
Correct Answer: C — Medulla oblongata
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Q. Which part of the chloroplast contains the thylakoid membranes?
-
A.
Stroma
-
B.
Outer membrane
-
C.
Inner membrane
-
D.
Granum
Solution
The granum is a stack of thylakoids where the light-dependent reactions occur.
Correct Answer: D — Granum
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Q. Which part of the digestive system is primarily involved in water absorption?
-
A.
Stomach
-
B.
Small intestine
-
C.
Large intestine
-
D.
Esophagus
Solution
The large intestine is primarily responsible for the absorption of water from indigestible food matter.
Correct Answer: C — Large intestine
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Q. Which part of the digestive system is primarily responsible for water absorption?
-
A.
Mouth
-
B.
Stomach
-
C.
Small intestine
-
D.
Large intestine
Solution
The large intestine is primarily responsible for the absorption of water and electrolytes from indigestible food matter.
Correct Answer: D — Large intestine
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Q. Which part of the flower develops into the fruit?
-
A.
Stamen
-
B.
Ovary
-
C.
Petal
-
D.
Sepal
Solution
The ovary of the flower develops into the fruit after fertilization, enclosing the seeds.
Correct Answer: B — Ovary
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Q. Which part of the flower is primarily responsible for attracting pollinators?
-
A.
Stamen
-
B.
Pistil
-
C.
Petals
-
D.
Sepals
Solution
Petals are often brightly colored and serve to attract pollinators to the flower.
Correct Answer: C — Petals
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