Lem 2016 @lem2016channel Channel on Telegram

Lem 2016

@lem2016channel

Lem 2016

Lem 2016 (English)

Are you looking for a channel that will provide you with insightful content and engaging discussions? Look no further than Lem 2016! This Telegram channel is dedicated to all things related to the year 2016, from significant events to popular trends. Who is Lem 2016? Lem 2016 is a Telegram channel curated by a group of passionate individuals who are fascinated by the year 2016 and all that it encompassed. Whether you want to reminisce about the past or learn something new about that particular year, Lem 2016 has got you covered. What is Lem 2016? Lem 2016 is a treasure trove of information about the year 2016. From global news events to entertainment highlights, this channel covers it all. You can expect to find posts about the hottest movies, music, fashion trends, and much more from that year. Join Lem 2016 today to stay informed and entertained with content that will transport you back to the memorable year of 2016. Stay updated on all things related to that year and engage in discussions with like-minded individuals who share your passion for nostalgia. Lem 2016 is not just a channel, it's a community of individuals who appreciate the significance of the past and its impact on the present. Don't miss out on the opportunity to be a part of this unique experience! Subscribe to Lem 2016 now and let the journey back to 2016 begin.

Lem 2016

05 Nov, 03:41

የREMEDIAL ፕሮግራም ምደባ ይፋ ሆነ።

(ጥቅምት 25/2017 ዓ.ም) በ2016 ትምህርት ዘመን የ12ኛ ክፍል ማጠቃለያ አገር አቀፍ ፈተና ወስደው ለትምህርት ሚኒስቴር ተጠሪ በሆኑ የመንግስት ዩኒቨርስቲዎች የREMEDIAL ፕሮግራም ለመከታተል የሚያስችል ማለፊያ ውጤት ያስመዘገቡ ተማሪዎች የተቋም ምደባ ይፋ ተደርጓል።

ከአሁን ሰዓት ጀምሮ ተማሪዎች ምደባቸውን

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ላይ መመልከት እንደሚችሉ ትምህርት ሚኒስቴር አሳውቋል።

ትምህርት ሚኒስቴር የተቋም ይቀየርልኝ ጥያቄ የማያስተናግድ መሆኑን ገልጿል።


መረጃዎችን በፍጥነት ለማግኘት ማሰፈንጠሪያዎቹን ይጫኑ!

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2,060
Lem 2016

02 Nov, 14:42

Here are the answers and explanations for the questions:

51. Blood Circulation System

• Answer: C
• Explanation: The correct order of blood flow in the diagram is: pulmonary vein, aorta, vena cava, pulmonary artery.

52. Protein Functions in Cell Membranes

• Answer: D
• Explanation: Carrier proteins are responsible for transporting specific ions across cell membranes, often against their concentration gradients.

53. Water Movement in a Cell

• Answer: B
• Explanation: Due to osmosis, water will move from the beaker (90% water) to the cell (15% solute) to try and equalize the solute concentration.

54. Learned Behavior

• Answer: C
• Explanation: Weaving a web is an instinctive behavior learned through inherited genetic instructions, making it a learned behavior.
1,088
Lem 2016

02 Nov, 14:42

Here are the answers and explanations for the questions:

43. Endemic Animal Species

• Answer: A
• Explanation: The Walia Ibex is an endemic animal species found in the Simien Mountains National Park, Ethiopia.

44. Pollution Statements

• Answer: A
• Explanation: Deforestation actually decreases the amount of CO2 absorbed from the atmosphere, as trees are responsible for carbon sequestration.

45. Organic Molecules

• Answer: B
• Explanation: Row number 3 contains only organic molecules: linoleic acid, glucose, and methane.

46. Enzyme and Food Stuff Match

• Answer: D
• Explanation: Trypsin is a digestive enzyme that breaks down proteins into smaller peptides.

47. Heart Attack First Aid

• Answer: C
• Explanation: In a cardiac emergency, it's crucial to ensure the airway is open by removing any obstructions. Tilting the head back helps to open the airway.
975
Lem 2016

02 Nov, 14:42

Here are the answers and explanations for the questions:

48. Bell-Jar Model of Breathing

• Answer: A
• Explanation: In the bell-jar model, pulling down the rubber sheet (representing the diaphragm) decreases the pressure inside the jar, causing air to enter the balloon "lungs."

49. Heart Structures and Function

• Answer: A
• Explanation: The right atrium receives deoxygenated blood from the body and pumps it to the right ventricle.

50. Aerobic Cellular Respiration

• Answer: B
• Explanation: Glycolysis takes place in the cytoplasm, while the electron transport chain occurs in the mitochondria.
836
Lem 2016

02 Nov, 14:42

64. Plant Cell in a Hypotonic Solution

• Answer: A
• Explanation: A hypotonic solution has a lower solute concentration than the cell's cytoplasm. Water will move into the cell, causing it to swell and become turgid.

65. Human Food Digestion

• Answer: D
• Explanation: The small intestine is the primary site for the absorption of digested food molecules.

66. Sickle Cell Anemia

• Answer: B
• Explanation: Sickle cell anemia is caused by a single base substitution (a point mutation) in the beta chain of hemoglobin.

67. Stanley Miller Experiment

• Answer: C
• Explanation: Stanley Miller's experiment simulated early Earth conditions to test the origin of life.

68. Darwin's Theory of Evolution

• Answer: A
• Explanation: Darwin's theory of evolution states that environmental changes can create a need for organisms to adapt.

69. Comparative Anatomy and Evolution

• Answer: B
• Explanation: Comparative anatomy provides evidence for evolution by comparing the structures of different organisms.
1,138
Lem 2016

02 Nov, 14:42

Here are the answers and explanations:

55. Transport of Substances

• Answer: C
• Explanation: Passive transport requires energy, often in the form of ATP, to move particles against their concentration gradient.

56. Aerobic Respiration in the Krebs Cycle

• Answer: A
• Explanation: In the Krebs cycle, reduced NAD and FAD carry hydrogen atoms, which are then split into protons and electrons.

57. Human Brain Evolution

• Answer: A
• Explanation: Modern humans have a brain size between 0.7% and 1.0% of their body mass.

58. Innate Behaviors

• Answer: A
• Explanation: Training killer whales is a learned behavior, as it requires conscious instruction and repetition. The other options are instinctive behaviors.
931
Lem 2016

02 Nov, 14:42

Here are the answers and explanations:

39. Enzyme Experiment

• Answer: C
• Explanation: The table shows that Enzyme Z has the lowest rate enhancement. This is likely because it doesn't use a cofactor, while the other enzymes benefit from metal ions.

40. Structural Formula

• Answer: B
• Explanation: The structure represents amylopectin, a branched form of starch.

41. Ethiopian Endemic Plant

• Answer: D
• Explanation: Bunna (Coffea arabica) is an endemic plant of Ethiopia, known for its use in coffee production.

42. Sharing Research Findings

• Answer: B
• Explanation: Reporting research findings is a crucial step in the scientific process, allowing for peer review and collaboration.
1,096
Lem 2016

02 Nov, 14:42

59. In-sight Learning

• Answer: D
• Explanation: In-sight learning involves a sudden realization or understanding of a solution, often without prior trial and error.

60. Territorial Behavior

• Answer: A
• Explanation: Territorial behavior is exhibited when an animal defends its territory from intruders.

61. Ethiopian Biologist and Vaccine

• Answer: D
• Explanation: Professor Tilahun Yilma is a renowned Ethiopian biologist known for his work developing a vaccine for the rinderpest disease.

62. Light Microscope

• Answer: A
• Explanation: When using a light microscope, adjusting the iris diaphragm to maximize brightness is a crucial first step, as it controls the amount of light reaching the specimen.

63. Plant Cell Structures

• Answer: A
• Explanation: The vacuole is a large, fluid-filled organelle in plant cells. It plays a central role in maintaining cell shape, storing substances, and regulating cell processes.

https://t.me/entrance_exam_ethiopia
967
Lem 2016

02 Nov, 14:42

70. Isolation Scenario

• Answer: B (Geographical isolation)
• Explanation: The formation of the Isthmus of Panama physically separated the shrimp populations, preventing gene flow and leading to geographic isolation.

71. End-Product Inhibition

• Answer: D
• Explanation: End-product inhibition occurs when the last product of a metabolic pathway inhibits the first enzyme of the pathway. This is a feedback mechanism that regulates the pathway's activity.

72. Catalase Enzyme Activity

• Answer: B (0.1 to 0.2)
• Explanation: The graph shows that the rate of reaction of catalase increases rapidly until it reaches a plateau at a substrate concentration of about 0.2%. This suggests that the enzyme is working at its maximum rate within that range.

73. Cell Theory

• Answer: C
• Explanation: Modern cell theory states that cells contain hereditary information that passes from cell to cell. This is the basis for the principle that all living things come from pre-existing cells (cell theory).
883
Lem 2016

02 Nov, 14:42

79. Water Cycle Diagram

• Answer: B
• Explanation: The correct order of the water cycle processes shown is: evaporation, precipitation, transpiration, condensation.

80. Primary and Secondary Succession

• Answer: C
• Explanation: Secondary succession is generally faster than primary succession because soil and nutrients are already present. It starts with a disturbance to an existing ecosystem.

81. Tropical Rainforest Biome

• Answer: B
• Explanation: Tropical rainforests are characterized by sparse, succulent plants that are adapted to the warm, humid climate and frequent rainfall.
1,108
Lem 2016

02 Nov, 14:42

88. Electron Transport System of Respiration

• Answer: D
➠ In the electron transport chain, a five-carbon compound is decarboxylated (loses a carbon atom) to form a four-carbon compound. This process releases CO2 as a byproduct.

89. Light-Independent Reactions of Photosynthesis

• Answer: A
➠The light-independent reactions, also known as the Calvin cycle, use reduced NADP (NADPH) to provide the hydrogen ions needed for the synthesis of glucose.

90. Factors Limiting Photosynthesis

• Answer: A
➠CO2 concentration limits the rate of photosynthesis by influencing the initial reaction with RuBisCo, the enzyme that fixes carbon.

91. Test Cross in Monohybrid Crosses

• Answer: B (Rr X rr)
➠ A test cross involves crossing an individual with an unknown genotype (Rr) with a homozygous recessive individual (rr).

92. Conservation Practices

• Answer: D
➠ The large-scale introduction of exotic plants can disrupt ecosystems and threaten biodiversity, as these invasive species can outcompete native plants.
2,216
Lem 2016

02 Nov, 14:42

82. Freshwater Biomes

• Answer: B
• Explanation: Freshwater biomes, like streams and rivers, are characterized by the presence of algae, planktons, and fish.

83. Intra-specific vs. Inter-specific Competition

• Answer: C
• Explanation: Intra-specific competition is more severe because individuals of the same species have similar adaptations and compete for the same resources.

84. Stages of Cell Division

• Answer: D
• Explanation: Telophase II concludes meiosis II, resulting in the formation of two haploid cells.

85. Sex-Influenced Trait

• Answer: C
➙ Undescended testicles (cryptorchidism) is a sex-influenced trait, meaning that the expression of the trait is influenced by sex hormones.

86. Lactate Production

• Answer: A
➙ When lactate is produced, NAD and FAD are regenerated from their reduced forms (NADH and FADH2).

87. Photosystem Structures

• Answer: D
➙ The thylakoid membrane within chloroplasts is where chlorophyll absorbs light energy, particularly in the blue and red wavelengths.
1,618
Lem 2016

02 Nov, 14:42

Here are the answers and explanations for the questions:

74. Onion Epidermal Cells

• Answer: D (300µm)
• Explanation: If 150 cells fit in a 2mm field of view at 100X magnification, each cell would be 2mm/150 cells = 0.0133mm wide. Since 1mm = 1000µm, a single cell is 13.3µm wide. Under 100X magnification, that would appear as 13.3µm * 100 = 1330µm. Therefore, the diameter of a single cell under 100X magnification is 1330µm, but since the options are rounded, we can say it is 150µm.

75. Prokaryotic Cell Characteristics

• Answer: B (Continuous loop of DNA)
• Explanation: Prokaryotes have a single circular chromosome that is not enclosed within a nucleus. Eukaryotic cells, on the other hand, have multiple linear chromosomes within a nucleus.

76. True Statement about Viruses

• Answer: B (Corona virus is a DNA virus)
• Explanation: The statement is incorrect. Coronaviruses, including the one responsible for COVID-19, are RNA viruses.
1,059
Lem 2016

02 Nov, 14:42

77. Steps in HIV Infection

• Answer: C (4, 6, 5, 2, 1, 3)
• Explanation: The logical order of the HIV infection steps is:
  1. Binding of gp120 to CD4 on a T-lymphocyte
  2. Fusion of HIV with the plasma membrane of the host cell
  3. Release of its RNA and reverse transcriptase into the cell
  4. Conversion of viral RNA into DNA and its incorporation into the cell's DNA
  5. Viral DNA's transcription into viral RNA and production of proteins
  6. Assembly of new viral particles from RNA, proteins, and reverse transcriptase

78. Nitrogen-Fixing Bacteria

• Answer: D (Rhizobium)
• Explanation: Rhizobium bacteria form a symbiotic relationship with legumes (like peas and beans), fixing nitrogen from the atmosphere and making it available to the plants.
1,270
Lem 2016

02 Nov, 14:42

𝐂𝐎𝐍𝐓.....

20. Vertebrate Classification

• Answer: D
• Explanation: The descriptions match: Amphibians (spa), Fish (spb), Birds (spc), Reptiles (spd), and Mammals (spe).

21. Cactus Adaptation

• Answer: C
• Explanation: Broad leaves help cacti collect more sunlight in their harsh environment.

22. Dermis Function

• Answer: D
• Explanation: The dermis contains blood vessels and sweat glands, which help regulate temperature and provide nourishment.

23. Dizziness from Spinning

• Answer: D
• Explanation: The sensory hairs in the semicircular canals continue moving after spinning stops, confusing the brain about orientation, causing dizziness.

@entrance_exam_ethiopia
878
Lem 2016

02 Nov, 14:42

Here are the answers and explanations for the questions:

24. Menstruation

• Answer: D
• Explanation: Menstruation occurs when the thick, spongy lining of the uterus detaches in the absence of pregnancy. This shedding of the lining is triggered by hormone changes.

25. Kidney Structures

• Answer: A
• Explanation: The Bowman's capsule acts as a filter in the nephron, separating waste products from the blood to form urine.

26. Behavioral Temperature Control

• Answer: D
• Explanation: Seeking shade is a behavioral response to high temperatures, allowing the animal to reduce its body temperature.

27. Glucose Oxidase
• Answer: D
• Explanation: Glucose oxidase is used in clinistix strips to reduce the viscosity of mucus, allowing for easier detection of glucose in urine.

28. Enzyme Nomenclature
• Answer: B
• Explanation: In enzyme nomenclature, the first number "1" refers to the Enzyme Commission, a system for classifying enzymes. The other numbers represent subclasses and classes.
@entrance_exam_ethiopia
893
Lem 2016

02 Nov, 14:42

13. Mitosis:
• Answer: C
• Explanation: Mitosis creates identical copies of cells.

14. Mendelian Inheritance:
• Answer: C
• Explanation: Heterozygous parents have a 50% chance of each homozygous genotype.

15. DNA:
• Answer: B
• Explanation: DNA is made of phosphate, sugar, and bases.

16. Phylum with Dorsal Rod-like Structure:
• Answer: B
• Explanation: Chordates have a notochord (a flexible rod).

17. Phylum and Organism Match:
• Answer: C
• Explanation: Snails belong to the Mollusca phylum.

18. Carbon Cycle:
• Answer: D
• Explanation: Plants release carbon dioxide during photosynthesis.

19. Liver Function:
The correct answer is A. Controlling cholesterol.

Here's why:

• The liver plays a crucial role in regulating cholesterol levels in the body. It helps to produce cholesterol and also removes excess cholesterol from the bloodstream.

@entrance_exam_ethiopia
946
Lem 2016

02 Nov, 14:42

29. Lock-and-Key Model

• Answer: C
• Explanation: The lock-and-key model describes how the shape of the substrate fits perfectly into the active site of the enzyme.

30. Apo-enzymes

• Answer: B
• Explanation: Apo-enzymes are proteins that require cofactors (non-protein components) to become active enzymes.

31. Competitive Inhibitors

• Answer: D
• Explanation: Competitive inhibitors block the active site of an enzyme, preventing the substrate from binding.

32. Leaf Structures

• Answer: B
• Explanation: The waxy cuticle on leaves prevents water loss and controls the entry of carbon dioxide, which is essential for photosynthesis.

33. Movement of Materials in Plants

• Answer: D
• Explanation: Active transport requires energy to move substances against a concentration gradient. This occurs in the xylem, which transports water and minerals upwards.

34. Gibberellins

• Answer: C
• Explanation: Gibberellins are plant hormones that promote stem elongation and root growth particularly in the roots.
907
Lem 2016

02 Nov, 14:42

Here are the answers and explanations for the questions:

35. Seed Observations

• Answer: D
• Explanation: The observations indicate that SA is a dicot (cotyledons remain underground, plumule forms a hook) and SB is a monocot (cotyledons above ground, plumule straightens).

36. Properties of Water

• Answer: B
• Explanation: Water requires a large amount of energy to change its state from liquid to vapor, which makes it an excellent coolant for living organisms.

37. Structure of Chromosome

• Answer: B
• Explanation: Glycogen is a complex carbohydrate that stores energy within the body. It plays a crucial role in the structure of chromosomes.

38. Glycogen Hydrolysis

• Answer: D
• Explanation: Glycogen is quickly broken down into glucose by enzymes (specifically, glycogen phosphorylase) to provide energy during respiration.
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