1.
Hati merupakan salah satu alat ekskresi yang mempunyai fungsi sangat penting bagi tubuh berikut ini yang
bukan merupakan fungsi hati adalah ....
Correct Answer
B. Memompa darah ke seluruh tubuh
Explanation
The liver is responsible for many important functions in the body, including the production of bile, the formation of urea, and the detoxification of harmful substances. However, it does not have the function of pumping blood throughout the body. This task is carried out by the heart, which is responsible for circulating oxygenated blood to all organs and tissues.
2.
Organ reproduksi pria yang berperan dalam proses pembentukan sperma yaitu….
Correct Answer
A. testis
Explanation
The testis is the male reproductive organ responsible for the formation of sperm. It is where spermatogenesis occurs, which is the process of sperm production. The testis also produces testosterone, the male sex hormone. Therefore, the testis plays a crucial role in the reproductive system of males.
3.
Manusia pada umumnya hanya melahirkan satu bayi, karena ….
Correct Answer
B. Hanya satu sel telur yang dihasilkan saat ovulasi
Explanation
The statement suggests that humans generally only give birth to one baby because only one egg is produced during ovulation. This means that there is only one opportunity for fertilization to occur, resulting in the development of a single embryo that can implant in the uterus.
4.
Penyakit menular pada organ reproduksi yang ditandai dengan kencing mengeluarkan nanah kental adalah ....
Correct Answer
B. Gonorrhoe
Explanation
Gonorrhoea is a sexually transmitted infection that affects the reproductive organs. It is characterized by symptoms such as thick, pus-like discharge from the urethra during urination. This matches the description given in the question. Sipilis, AIDS, and herpes genitalis are also sexually transmitted infections, but they do not specifically cause thick, pus-like discharge during urination.
5.
Pada sistem saraf manusia terdapat beberapa macam sel saraf dengan fungsinya masing-masing. Sel saraf yang berfungsi membawa rangsang dari indra/reseptor ke saraf pusat neuron adalah ....
Correct Answer
A. Sel saraf sensoris
Explanation
The correct answer is "sel saraf sensoris". Sel saraf sensoris adalah jenis sel saraf yang berfungsi membawa rangsang dari indra atau reseptor ke saraf pusat neuron. Sel saraf ini berperan dalam mengumpulkan informasi dari lingkungan eksternal dan mengirimkannya ke otak atau sumsum tulang belakang untuk diproses dan diinterpretasikan. Sel saraf sensoris juga berperan dalam merasakan rangsangan seperti suhu, tekanan, sentuhan, dan nyeri.
6.
Bagian no 1, 2, dan 3 berturut-turut adalah . . . .
Correct Answer
A. Dendrit, nucleus dan badan sel
Explanation
The correct answer is "Dendrit, nucleus dan badan sel". Dendrits are the branched extensions of a neuron that receive signals from other neurons. The nucleus is the control center of the cell, containing genetic material and regulating cell activities. The cell body, also known as the soma or the perikaryon, contains the nucleus and other organelles and is responsible for maintaining the overall functioning of the neuron. Therefore, the correct order is dendrit, nucleus, and cell body.
7.
Secara garis besar telinga manusia terdiri dari 3 bagian, yaitu telinga luar, tengah dan dalam. Bagian telinga luar tersusun atas ....
Correct Answer
D. gendang telinga, lubang telinga, daun telinga
Explanation
The correct answer is "gendang telinga, lubang telinga, daun telinga". This is because the question is asking for the parts of the outer ear, and the gendang telinga (eardrum), lubang telinga (ear canal), and daun telinga (pinna) are all components of the outer ear.
8.
Jika lensa mata seseorang terlalu cembung, sehingga bayangan benda jatuh di depan retina maka akan mengalami gangguan penglihatan yang disebut ….
Correct Answer
D. Miopi
Explanation
Miopi, juga dikenal sebagai rabun dekat, adalah gangguan penglihatan di mana seseorang memiliki kesulitan dalam melihat objek yang jauh. Ketika lensa mata seseorang terlalu cembung, bayangan benda jatuh di depan retina, yang menyebabkan penglihatan kabur saat melihat objek yang jauh. Ini berbeda dengan hipermetropi, di mana bayangan jatuh di belakang retina, dan presbiopi, yang terkait dengan penuaan lensa mata. Astigmatisme, di sisi lain, melibatkan kelainan bentuk lensa mata atau kornea, yang menyebabkan penglihatan kabur baik pada jarak dekat maupun jarak jauh.
9.
Berikut ini adalah contoh akibat dari seleksi alam, kecuali ....
Correct Answer
D. Bunglon mengubah warna tubuhnya untuk mengelabui mangsa
Explanation
The given options describe various examples of natural selection, where certain traits or characteristics of organisms are favored or selected for in order to increase their chances of survival and reproduction. The first option states that the presence of brightly colored butterfly species is replaced by dark-colored butterfly species, which could be a result of predators being more attracted to the bright colors. The second option explains the extinction of dinosaurs due to environmental changes, which could have made their survival difficult. The third option suggests that the shape of the beak of finch birds changes according to the type of food they eat, which is an adaptation for better feeding. The correct answer states that chameleons change their body color to deceive or confuse their prey, which is a form of camouflage and a survival strategy.
10.
Jumlah kromosom dalam sel tubuh kucing adalah 78 kromosom, maka jumlah kromosom dalam sel kelaminnya adalah ....
Correct Answer
B. 39 pasang
Explanation
Kucing memiliki 39 pasang kromosom dalam sel kelaminnya karena jumlah kromosom dalam sel tubuh kucing adalah 78. Dalam sel tubuh, setiap kromosom memiliki pasangan yang serupa. Namun, dalam sel kelamin, hanya terdapat setengah dari jumlah kromosom dalam sel tubuh. Oleh karena itu, jumlah kromosom dalam sel kelamin kucing adalah 39 pasang.
11.
Individu yang bergenotif AaBb akan mempunyai gamet ....
Correct Answer
A. AB, Ab, aB dan ab
Explanation
Individu yang bergenotif AaBb akan mempunyai gamet AB, Ab, aB dan ab. This is because individuals with genotype AaBb have two different alleles for each gene (A and a for one gene, and B and b for the other gene). During gamete formation, these alleles segregate independently, resulting in four possible combinations of alleles: AB, Ab, aB, and ab.
12.
Tanaman berbiji bulat (BB) disilangkan dengan tanaman berbiji kisut (bb) menghasilkan keturunan yang berbiji bulat (Bb) semua. Kemudian F1 disilangkan dengan sesamanya menghasilkan 200 tanaman. Berapakah kemungkinan jumlah tanaman yang berbiji bulat pada keturunan ke-2 (F2)?
Correct Answer
D. 150
Explanation
When a round-seeded plant (BB) is crossed with a wrinkled-seeded plant (bb), all the offspring have round seeds (Bb). When the F1 generation is crossed with each other, it results in 200 plants. The possible combinations of alleles in the F1 generation are BB, Bb, and bb. Since 100% of the F1 plants have round seeds, it can be inferred that all the F1 plants must have at least one dominant allele (B). Therefore, when the F1 plants are crossed with each other, the possible combinations in the F2 generation are BB, Bb, and Bb. This means that all the F2 plants will have round seeds. Therefore, the number of plants with round seeds in the F2 generation is 150.
13.
Mikroorganisme yang berperan pada pembuatan tape singkong dan tempe adalah ….
Correct Answer
D. Aspergillus oryzae dan Rhizopus oryzae
Explanation
The correct answer is Aspergillus oryzae dan Rhizopus oryzae. These microorganisms are involved in the fermentation process of making tape singkong and tempe. Aspergillus oryzae is commonly used in the production of tape singkong, a traditional Indonesian fermented cassava product. Rhizopus oryzae, on the other hand, is responsible for the fermentation process in making tempe, a traditional Indonesian soybean product. Both microorganisms play a crucial role in breaking down the carbohydrates and proteins present in the raw materials, resulting in the characteristic flavors and textures of tape singkong and tempe.
14.
Berikut ini merupakan produk bioteknologi hasil olahan susu sapi, kecuali ....
Correct Answer
A. Nata de coco
Explanation
Nata de coco is not a product that is derived from cow's milk. It is actually a product made from coconut water through a fermentation process. On the other hand, yogurt, butter, and cheese are all dairy products that are made from cow's milk. Therefore, nata de coco is the only option that does not belong to the category of biotechnology products derived from cow's milk.
15.
Berdasarkan tabel berikut, bahan makanan yang
mengandung glukosa adalah. . ..
Correct Answer
B. 1, 3, dan 4
Explanation
Based on the given table, the foods that contain glucose are items 1, 3, and 4.
16.
Berdasarkan gambar, kerja antara otot trisep dan bisep adalah ....
Correct Answer
B. Antagonis
Explanation
Based on the image, the relationship between the tricep and bicep muscles is antagonistic. This means that when one muscle contracts, the other muscle relaxes. In this case, when the tricep muscle contracts, the bicep muscle relaxes, and vice versa. This antagonistic relationship allows for the movement of the arm, such as bending and straightening at the elbow joint.
17.
Perhatikan ciri-ciri sel darah berikut:
(1) tidak mempunyai bentuk tetap,
(2) mempunyai inti sel,
(3) tidak mengandung hemoglobin,
(4) dapat mencerna sel mati (pagosit),
(5) dapat menembus dinding kapiler (diapedesis).
Berdasarkan ciri-ciri sel darah tersebut, merupakan ciri sel darah ....
Correct Answer
B. Leukosit
Explanation
Based on the given characteristics, the correct answer is leukosit. Leukocytes are white blood cells that do not have a fixed shape, have a nucleus, do not contain hemoglobin, can engulf dead cells (phagocytosis), and can pass through capillary walls (diapedesis). Erythrocytes are red blood cells that do not have a nucleus and contain hemoglobin. Thrombocytes are platelets involved in blood clotting. Phagocytes are a type of leukocyte that can engulf and digest foreign particles.
18.
Berdasarkan kandungan zat dalam urin seperti pada tabel tes urin tersebut, maka dapat disimpulkan bahwa urin berasal dari orang yang menderita penyakit diabetes melitus, karena ....
Correct Answer
C. Urinnya mengandung gula
Explanation
Based on the content of substances in the urine as shown in the urine test table, it can be concluded that the urine is from a person suffering from diabetes mellitus because it contains sugar. Diabetes mellitus is a condition characterized by high blood sugar levels, and the presence of sugar in the urine is a common symptom of this disease.
19.
Proses penyerapan kembali zat-zat yang masih berguna bagi tubuh dan penampungan urin sementara sebelum ke ureter terjadi pada . . ..
Correct Answer
C. Tubulus proksimal dan tubulus kolektifus
Explanation
The correct answer is "tubulus proksimal dan tubulus kolektifus". This is because the process of reabsorption of useful substances and temporary storage of urine before it goes to the ureter occurs in the proximal tubule and collecting duct. The proximal tubule is responsible for reabsorbing most of the filtered substances such as glucose, amino acids, and water, while the collecting duct collects urine from multiple nephrons and further concentrates it.
20.
Untuk menghasilkan gas dalam tabung reaksi semakin banyak, faktor-faktor yang memengaruhi adalah. . ..
Correct Answer
B. Menyalakan lampu dan menambah air
Explanation
The correct answer is "menyalakan lampu dan menambah air" because lighting the lamp will provide heat energy which can increase the rate of the chemical reaction inside the reaction tube, leading to the production of more gas. Additionally, adding more water to the reaction tube can increase the concentration of the reactants, which can also increase the rate of the reaction and result in the production of more gas.
21.
Variasi genotip Bbmm pada keturunan ke-2 (F2) bila keturunan pertama (F 1) disilangkan sesamanya adalah ....
Correct Answer
C. 2/16
Explanation
The given correct answer is 2/16. This can be explained by understanding the principles of Mendelian genetics. In the F1 generation, when two individuals with genotypes Bbmm are crossed, each parent can produce two types of gametes: Bm and bm. When these gametes combine in the F2 generation, there are four possible genotypes: BmBm, Bmbm, bmBm, and bmbm. Among these four genotypes, only one genotype (BmBm) has the desired genotype Bbmm. Therefore, the probability of obtaining the desired genotype in the F2 generation is 1 out of 16, which is equivalent to 2/16.
22.
Kelebihan PST (Protein Sel Tunggal) dibanding dengan makanan yang lain adalah sebagai berikut, kecuali ....
Correct Answer
D. Kandungan karbohidrat tinggi
Explanation
The correct answer is "kandungan karbohidrat tinggi" (high carbohydrate content). The other options listed are the advantages of PST (Protein Sel Tunggal) compared to other foods. PST has a high protein content, it grows quickly, and it can be grown in various types of growing media. However, it does not have a high carbohydrate content.
23.
Pernyataan dari tabel yang benar adalah ....
Correct Answer
D. D
24.
Pembuluh darah yang kaya oksigen adalah ....
Correct Answer
A. 2, 3, dan 6
25.
Pernyataan yang sesuai dengan grafik adalah ....
Correct Answer
A. Ovulasi berlangsung di sekitar hari ke-14
Explanation
The correct answer is "ovulasi berlangsung di sekitar hari ke-14". This is because the statement accurately reflects the information provided in the graph. The graph likely shows the hormonal changes during a menstrual cycle, and it indicates that ovulation occurs around day 14.