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- Question
The size of the pupil is controlled by the
Options- A. Retina
- B. Iris
- C. Cornea
- D. Lens
- Correct Answer
- Iris
ExplanationThe size of the pupil is controlled by the Iris when light enters the eye.
- 1. The hormone associated with aggression seems to be
Options- A. Testosterone
- B. Adrenaline
- C. Estrogen
- D. Peptone Discuss
- 2. Which shows a correctly paired DNA molecule?
Options- A. AT
- B. TC
- C. AC
- D. TG Discuss
- 3. Stress is a factor that contributes to heart disease risk.
Options- A. TRUE
- B. FALSE Discuss
- 4. Which is a function of a protein macromolecule?
Options- A. Cushions the internal organs of an animal
- B. Provides the building instructions for living things
- C. Makes up the connective tissue in tendons
- D. Makes the leaves of plants waterproof Discuss
- 5. REM sleep is also known as paradoxical sleep because
Options- A. Measures of the brain activity closely resemble waking consciousness, but the person is incapable of moving.
- B. The person can have night terrors during this stage but will not remember them in the morning. (E) Th e person's vital signs are very slow, but the person can get up and walk around
- C. Measures of the brain activity closely resemble waking consciousness, but the person is in the deepest stage of sleep.
- D. The person's heart rate is slower than when awake, but the person can sleepwalk or sleep talk. Discuss
- 6. Membrane bound organelles are not found in the cells of
Options- A. Eukaryotes
- B. Prokaryotes
- C. Both A & B
- D. Nokaryotes Discuss
- 7. Nucleic acid hybridization is based on the fact that
Options- A. a chromosome is composed of complementary strands
- B. all cells have DNA
- C. the strands of DNA can be separated
- D. pairing between complementary bases occurs Discuss
- 8. A genus can best be defined as
Options- A. a taxon composed of one or more species and a classification level lying below family
- B. a taxon composed of families
- C. the most specific taxon
- D. a taxon comprised of classes Discuss
- 9. Which organelle performs cellular respiration?
Options- A. mitochondria
- B. cytolasm
- C. chloroplasts
- D. All of the above Discuss
- 10. A Phospholipid is a Discuss
Biology problems
Search Results
Correct Answer: Testosterone
Explanation:
Testosterone is the hormone which is associated with aggression.
Correct Answer: AT
Explanation:
The nucleotides that are present in DNA molecule are 4. They are Thymine (T), Guanine (G), Adenine (A) and Cytosine (C).
Here in this Adenine pairs with Thymine (A - T) and Cytosine pairs with Guanine (C - G).
Correct Answer: TRUE
Explanation:
True, Stress is a factor that contributes to heart disease risk.
More factors that contributes to heart disease risk are blood pressure, cholesterol, smoking, physical inactivity and overeating.
Correct Answer: Makes up the connective tissue in tendons
Explanation:
The function of a protein macromolecule is
- Moving things in and out of cells.
- Transporting other molecules in the body.
- Making up the connective tissue in tendons.
Correct Answer: Measures of the brain activity closely resemble waking consciousness, but the person is incapable of moving.
Explanation:
REM sleep i.e, Rapid Eye Movement sleep is also known as paradoxical sleep because the measures of the brain activity closely resemble waking consciousness, but the person is incapable of moving as the brain is in fully active mode that time.
Correct Answer: Prokaryotes
Explanation:
Membrane bound organelles are not found in the cells of Prokaryotes whereas Eukaryotes have nucleus and membrane bound organelles.
For example : Bacteria is prokaryotic organism with lack of nucleus and membrane bound organelles whereas fungi is a eukaryotic with nucleus and membrane bound organelles.
Correct Answer: pairing between complementary bases occurs
Correct Answer: a taxon composed of one or more species and a classification level lying below family
Explanation:
A genus can best be defined as a taxon composed of one or more species and a classification level lying below family.
Correct Answer: mitochondria
Correct Answer: A Phospholipid is a lipid molecule which has hydrophilic head and a hydrophobic tailand and is a main component in making of all cell membranes in which they two form a parallel layers called Phospholipid bilayer
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