Exam Flashcards
Homeostasis is defined as:
The ability of body systems in general to resist or reverse change in their environment or activity
The majority of DNA in a cell is contained within the nucleus.
True or False
True
Phospholipids:
A. Provide structural support for DNA in the cell nucleus
B. Are stored as fat in adipose tissue
C. Assemble in a double layer to form cell membranes
D. Pad and insulate body organs
C. Assemble in a double layer to form cell membranes
A simple sugar is called
Monosaccharide
- Which of the following is controlled by a positive feedback mechanism?
A. Blood pressure
B. Blood volume
C. Blood clotting
D. Red blood cell numbers
C. Blood clotting
If someone has red hair and freckles, this description reveals a persons __
Phenotype
What is the function of the smooth endoplasmic reticulum?
Synthesis of lipids and steroid hormones
In mitosis, the mitotic spindle appears in:
Prophase
The largest organelle in the cell is
The nucleus
Which of the following statements applies to osmosis?
A. It requires energy
B. It refers specifically to movement of water and water-soluble molecules
C. It occurs across the cell membrane until equilibrium is reached
D. It can transfer molecules up a concentration gradient
C. It occurs across the cell membrane until equilibrium is reached
ATP (Adenosine Triphosphate) contains which of the following?
A. Deoxyribose sugar, a phospholipid and a base
B. Ribose sugar, a base and three phosphate groups
C. Three phosphorylated sugars, a base and the amino acide adenosine
D. Three fatty acids, ribose sugar and a phospholipid backbone
B. Ribose sugar, a base and three phosphate groups
What is the role of ATP in cellular energy production?
A. ATP is broken down in the presence of oxygen to release energy
B. ATP is synthesised by enzymes in the mitochondria, which convert it to ADP (adenosine diphosphate) by adding on one phosphate group
C. When ATP is broken down, it releases oxygen for cellular energy
D. Release of energy from cellular metabolism is used to synthesise ATP, which stores this energy until it is required
D. Release of energy from cellular metabolism is used to synthesise ATP, which stores this energy until it is required
The functional units of DNA are called:
Genes
Meiosis:
A. Involves 3 distinct cell divisions to produce gametes
B. Ensures the daughter cells have exact copies of the parent cell’s DNA
C. Produces four haploid daughter cells, all genetically different to each other
D. Involves the process of crossing over, which takes place at the second meiotic division
C. Produces four haploid daughter cells, all genetically different to each other
Homozygous alleles are:
A. Two identical copies of the same gene on matching chromosomal loci
B. Two identical copies of the same chromosome, following mitosis
C. Two identical chromatids belonging to the same chromosome
D. Either of the chromosomes belonging to a chromosome pair
A. Two identical copies of the same gene on matching chromosomal loci
Which of the following is true of sex-linked inheritance?
A. Daughters cannot inherit a sex-linked gene
B. A sex-linked gene is carried on the Y chromosome
C. Males have only one copy of a sex-linked gene
D. Sex-linked genes are transmitted by the father, not the mother
C. Males have only one copy of a sex-linked gene
The cell component that contains DNA and controls the cellular activity is the
Nucleus
A cell organelle that destroys old cells and digests old substances in the body is the:
Lysosomes
The cell component that is the outer surface of the cell and regulates the material going in and out of the cell is the:
Plasma membrane / Cell membrane
Protects the DNA and is over the cell’s activity.
A. Nuclei
B. Nuclear envelope
C. Nucleus
D. Nucleolus
B. Nuclear envelope
Produces membrane and studded with ribosomes.
A. Mitochondria
B. Smooth endoplasmic reticulum
C. Rough endoplasmic reticulum
D. Cytoplasm
C. Rough endoplasmic reticulum
Mitochondria
A. Provides energy to the cell through cytosine breakdown
B. Protects energy in the cell
C. Provides energy to the cell through glucose breakdown
D. Provides energy to the cell through phosphoric breakdown
C. Provides energy to the cell through glucose breakdown
Golgi Complex.
o A. Acts as the post office
o B. Sorts and separates and repackages glucose
o C. Sorts separates and repackages proteins
o D. Sorts separates and repackages neurons
C. Sorts separates and repackages proteins
Detoxifies drugs and produces membrane acting as the rehab center component of the cell is the:
o A.
Smooth endoplasmic reticulum
o B.
Cilia
o C.
Rough endoplasmic reticulum
o D.
Cytoplasm
A. Smooth endoplasmic reticulum
Ribosomes:
o A.
Creates sites for factories
o B.
Site where protein synthesis begins
o C.
Site where protein synthesis ends
o D.
Site where protein synthesis are produced
B. Site where protein synthesis begins
Multiple nucleus is called ____ and ____ is the extension of the plasma membrane that allows things in and out ____ is the source that moves only in humans.
o A.
Cilia, nuclei, flagellum
o B.
Nuclei, cilia, flagellum
o C.
Nuclei, cytosol, flagellum
o D.
Nuclei, cilia, flagellums
B. Nuclei, cilia, flagellum
Cytoskeleton:
o A.
Produces bone membranes
o B.
Produces cells
o C.
Converts the cell through several processes
o D.
Converts the membrane through several processes
C. Converts the cell through several processes
Waterloving is ______ and waterfearing is __________
o A.
Phylogenetic and phylogenetic
o B.
Hypothermulus and hyperthermus
o C.
Hydrophilic and hydrophobic
o D.
Hydrophobic and hydrophobic
C. Hydrophilic and hydrophobic
