20 numbers Biology 2019

 1. What would happen if the rough endoplasmic reticulum in an organism's cells lost all its ribosomes? A. The organism's protein production would cease. B. Protein storage within the cell would increase. C. ATP production within the cell would cease. D. Protein would no longer be exported from the cell. E. Protein would be imported from outside the cell. 

2. One of the stages in photosynthesis is the light reactions. Which statement regarding the light reactions is correct? A. The light reactions occur in the stroma and produce energy. B. The light reactions occur in the grana and produce energy. C. The light reactions convert light energy into mechanical energy, thus producing energy. D. The products of the light reactions are NADPH2, ATP, and the release of O2. E. The O2 released from the light reactions comes from photolysis using the isotope 16O. 

3. The thing that is not needed in the biosynthesis process is... A. precursor compounds B. chemical energy C. catalytic enzymes D. oxygen E. coenzymes 

4. The incorrect statement regarding microalgae is…. A. are among the earliest organisms on Earth B. are multicellular organisms C. can be found in the sea and fresh water D. supply approximately half of the oxygen in the atmosphere E. microalgae that died billions of years ago fossilized into petroleum 

5. Which statement is correct regarding energy flow? A. The energy obtained by grizzly bears will be equal to that received by red-tailed hawks. B. If grouse become extinct, the energy flow to grizzly bears will be greater than that to red-tailed hawks. C. The energy flow from all producers is guaranteed to be the same for all herbivores. D. Detritivores are not included in the energy flow cycle. E. It is certain that the energy flow in the food web will never change. 

The following information is used to answer questions 6 through 8. 

6. Three species of fish live in the same body of water. Several environmental quality parameters limit the three species, allowing them to develop specific characteristics and exist independently. A. 1 - 2 - 3 B. 2 - 3 - 1 C. 3 - 2 - 1 D. 1 - 3 - 2 E. 2 - 1 - 3

7. The most likely scenario, if all three species are still found in the same habitat in even numbers, is… A. a large amount of habitat resources are available B. food resources are available in limited quantities C. there is no competition between species 1, 2, and 3 in the habitat D. the environmental carrying capacity of each species can be met, although limited E. species 1, 2, and 3 will alternately become dominant so that food availability can vary. 

8. The highest competition for habitat, using the physical parameters of the environment where seawater and freshwater meet, will occur between species… A. 1 and 2 B. 1 and 3 C. 2 and 3 D. 1, 2, and 3 E. cannot be determined 

9. After telophase 1 of meiosis, the chromosome composition of each daughter cell is… A. diploid, and each chromosome is composed of a single chromatid B. diploid, and each chromosome is composed of two chromatids C. haploid, and each chromosome is composed of a single chromatid D. haploid, and each chromosome is composed of two chromatids E. tetraploid, and each chromosome is composed of two chromatids 

10. Codominance, multiple alleles, and lethal alleles are examples of apparent deviations from Mendel's laws. These deviations are considered apparent because… A. deviations occur only in phenotype, not in the behavior of alleles during meiosis B. the sum of the phenotypic ratios resulting from crosses in these three deviations remains constant C. the sum of the genotypic ratios resulting from crosses in these three deviations remains constant D. deviations occur only at the allele level, not at the gene level E. the sum of the phenotypic and genotypic ratios in deviations always differs 

11. DNA sequencing is possible because the 3rd C atom of the sugar molecule in the nucleotide undergoes… A. oxidation B. deoxy C. dideoxy D. reduction E. oxidoreduction 

12. Cell culture is a technique in plant biotechnology that utilizes undifferentiated cells to produce functional cells and/or new individuals. This technique utilizes plant cells that are… A. totipotent B. meristematic C. embryonic D. pluripotent E. zygotic

13. The vascular cambium in dicot stems will develop into secondary phloem and secondary xylem. The correct growth direction is…. A. outward forming secondary phloem, inward forming secondary xylem B. inward forming secondary phloem, outward forming secondary xylem C. outward forming secondary phloem and xylem D. inward forming secondary phloem and xylem E. in the transverse direction, both types form vascular tissue 

14. The symplastic movement of water in the central cylinder of dicot roots is caused by…. A. the Casparian strip is impermeable to water in the endodermis layer B. the central cylinder is composed of thick-walled cells C. the endodermis has lignified cell walls D. the cells in the central cylinder are impermeable to water E. there are intercellular cavities in the central cylinder 

15. The mechanism that is not a function of epithelial tissue is…. A. protection B. contraction C. absorption D. secretion E. adsorption 

16. Which statement is incorrect regarding the exchange of oxygen and carbon dioxide in the human respiratory system? A. The exchange of oxygen and carbon dioxide in the capillaries occurs by osmosis in the alveoli and body tissue cells. B. In the alveoli, gas molecules move through the respiratory membrane from high to low partial pressure. C. The exchange of oxygen and carbon dioxide in body tissues is greatly influenced by partial pressure. D. If the CO2 pressure in the alveoli is 40 mmHg and the CO2 pressure in the capillaries is 46 mmHg, then CO2 will diffuse from the capillaries to the alveoli. E. If the O2 pressure in the alveoli is 100 mmHg and the O2 pressure in the lungs is 40 mmHg, then O2 will diffuse from the alveoli through the respiratory membrane into the pulmonary capillaries. 

17. To aid orientation between up and down, most fish have an organ called the... A. proprioceptor B. pit organ C. cochlea D. statocyst E. neuromast 

18. The percentage of colorblind men in Indonesia is around 7%. The percentage of colorblind women and carriers is… A. 13.02% and 0.49% B. 0.07% and 0.7% C. 13.02% and 49% D. 93% and 7% E. 0.93% and 0.49%

19. The moss we see every day is the gametophyte phase, meaning the phase of the moss plant is…. A. capable of producing spores B. capable of producing gametes C. with the shortest metagenesis process D. after undergoing generative development E. with 2n chromosomes 

20. Animals with the main characteristic of triploblastic acoelomates are…. A. Platyhelminthes B. Nematoda C. Annelida D. Mollusca E. Echinodermata