Deck 15 (281 - 300) Flashcards
- What type of mammalian cells are without nucleus?
red blood cells
- Before amphibians could be successful on land, the had to:
a. develop a more efficient heart
b. develop lungs
c. develop a way to prevent drying
d. all of the above
d. all of the above
- Thymus of man:
a. play an important role in the lymphatic system
b. is best developed in adult individuals
c. is an organ where B-lymphocytes mature
d. is usally replaced in adulthood by muscle tissue
plays an important role in the lymphatic system
- Cultivation of cells or tissues out of the organism is designated as:
a. in vivo
b. in natura
c. in vitro
d. in infinitum
c. in vitro
- The principle of independent segregation is frequently referred to as ?
Mendel’s first law
- Archaeopteryx had which key bird-like features:
a. hollow bones
b. featherswell
c. well-developed collarbone
d. b + c
d. b + c
- Tonsils of man:
a. are the biggest lymphatic organ
b. are the central organ of the lymphatic system
c. are considered as an immunological filter of blood
d. are situated in laryngeal epithelium
are situated in laryngeal epithelium
- Intake of substances in the form of solution is called ?
pinocytosis
- The Dutch botanist Hugo de Vries believed, that hereditary changes are caused only by:
a. adaptation
b. mutation
c. recombination
d. conjugation
b. mutation
- According to the scientific theory of the origin if life on earth, life arose spontaneously from inanimate chemicals. Do scientists think this process is still ongoing on earth today:
a. yes, it probably is ongoing
b. no, because conditions on earth have changed and are no longer conductive to spontaneous evolution of life
b. no, because conditions on earth have changed and are no longer conductive to spontaneous evolution of lif
- Transfer of substances as a rule against the concentration gradient is ?
active transport
- Mark the correct statement/s about the mRNA molecule:
a. it is double stranded
b. it is single stranded
c. its structure resembles a clover leaf
d. its structure resembles a lime tree leaf
b. it is single stranded
- Which of the following criteria is necessary and sufficient by itself to define life:
a. movement
b. sensitivity
c. complexity
d. none of the above
d. none of the above
- Non-specific phagocytary immune defence of man is performed by ?
eosinophils
- The universal transporter of energy in a cell is the molecule of:
a. ADP
b. NADPH+
c. ATP
d. cAMP
ATP
- Transmission of genes into the daughter cells is provided by:
a. mitotic division
b. reduplication of the mRNA
c. transcription of the RNA
d. conjugation
a. mitotic division
- Which of the following possible explanations of the origin of life on earth allows testable hypotheses to be constructed:
a. evolution
b. spontaneous origin
c. extraterrestrial origin
d. none of the above
a. evolution
- Blood groups of man are determined:
a. by the type of antigen present in blood plasma
b. by ability of erythrocytes to produce antibodies
c. by individual type of plasmatic proteins in any individual
d. by the presence of specific antigens in the membrane of erythrocytes
d. by the presence of specific antigens in the membrane of erythrocytes
- Cell organelles typical for plant cells include:
a. plastids
b. centrioles
c. lysosomes
d. intercalar discs
a. plastids
- Microorganisms in human body are usually retained:
a. in the tissue fluid
b. in the blood plasma
c. in the lymph nodes
d. in blood plasma
in the lymph nodes
