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Twelfth Grade (Grade 12) Biology Questions

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Grade 12 Human Reproduction
Grade 12 Biochemical Pathways
Grade 12 Macromolecules
Pick a macromolecule from the list below.
  1. Oxygen
  2. Bacteria
  3. Protein
  4. Fruit Flies
Grade 12 Nervous and Endocrine Systems
The Brain is part of the                 system.
  1. Respiratory
  2. Reproductive
  3. Nervous
  4. Epithelium
Grade 12 Cell Structure and Function
The following are phases of cell mitosis except:
  1. Anaphase
  2. Metaphase
  3. Exophase
  4. Telophase
Grade 12 Cell Structure and Function
Osmosis is the movement of water across a membrane and
  1. Down a water potential gradient
  2. Up a hill
  3. Symbiotic
  4. All of the above
Grade 12 Macromolecules
An ATP molecule is made up of                                           .
  1. matrix, inner membrane, outer membrane
  3. adenine, phosphate groups and ribose
  4. proteins, carbohydrates, and nucleic acids
Grade 12 Circulatory and Immune Systems
Grade 12 DNA, RNA, and Genetics
Grade 12 Macromolecules
Grade 12 Human Reproduction
The          uterus          is also known as the womb.

The           ovaries           produce the egg inside a woman.

The            scrotum             contains the male's testes.

The                  prostate gland                  lies beneath the bladder, and secretes a fluid that gives semen its characteristic odor and texture.

Prenatal development begins with the union of the egg and the sperm, this union is also known as              conception             .

The sex cells are also called           gametes          .

The pattern of cell division that is responsible for transmitting traits from both parents to the developing child is called           meiosis          .

Once the two sex cells combine, that cell now has      46      chromosomes. This new cell is called a          zygote         .

The baby will be a girl if the          father          transmits a                X chromosome               , and the baby will be a boy if a                Y chromosome                is transmitted.

Chromosomes carry         genes         which are key to a person's uniqueness.

The period of the          embryo          is from week 3 to 8. During this period, the cells of the embryo form a root-like structure called a            placenta           , that attaches to the spongy wall of the uterus. The                amniotic sac                is also formed around the baby for protection.

The period of the         fetus         is from week 8 until birth. During the ninth month, the baby moves his/her head down into the birth canal. This process is called              lightening             .

A baby is considered full term between      37      and      42      weeks.
Grade 12 Biochemical Pathways
Grade 12 Macromolecules
Grade 12 Macromolecules
Grade 12 Respiration, Digestion, and Excretion
Grade 12 Skin, Skeleton, and Muscles
Grade 12 Biochemical Pathways
How do enzymes make reactions go faster?
  1. They lower activation energy
  2. They raise the activation energy
  3. They supply extra reactants
  4. They limit the amount products in the reaction
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