Latihan Un IPA Biologi Smp
Questions and Answers
- 1.
Perhatikan pernyataan berikut! 1. Cumi-cumi menyemprotkan cairan tinta ketika terancam 2. Ayam betina bertelur setiap hari 3. Amoeba membelah diri pada saat tertentu 4. Manusia berkeringat ketika berolahraga Berdasarkan pernyataan tersebut yang menunjukkan ciri berkembangbiak adalah...
- A.
1 dan 2
- B.
2 dan 3
- C.
2 dan 4
- D.
3 dan 4
Correct Answer
B. 2 dan 3Explanation
The correct answer is 2 and 3. The statement "Ayam betina bertelur setiap hari" indicates the reproductive characteristic of laying eggs, which is a form of reproduction. The statement "Amoeba membelah diri pada saat tertentu" indicates the reproductive characteristic of asexual reproduction through cell division. Both of these statements demonstrate different forms of reproduction, making them the correct choices for the question.Rate this question:
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- 2.
Perhatikan data berikut ini ! 1. berkembangbiak secara vivipar 2. berdarah panas 3. penutup tubuh berupa bulu 4. menyusui anaknya 5. penutup tubuh berupa rambut Dari pernyataan di atas, ciri-ciri yang dimiliki hewan mamalia adalah...
- A.
1, 2, dan 3
- B.
1, 4, dan 5
- C.
2, 3, dan 5
- D.
2, 4, dan 5
Correct Answer
B. 1, 4, dan 5Explanation
The correct answer is 1, 4, and 5. This is because mammals are animals that reproduce viviparously, meaning they give birth to live young. They also have warm blood, which helps regulate their body temperature. Additionally, mammals have a body covering of either fur or hair, which helps to insulate and protect their bodies. The characteristic of nursing their young with milk is also unique to mammals. Therefore, options 1, 4, and 5 are the correct choices as they all describe characteristics of mammals.Rate this question:
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- 3.
Usaha yang paling tepat untuk mengurangi pencemaran udara di perkotaan adalah...
- A.
Membuat taman kota
- B.
Membersihkan selokan
- C.
Menambah area bebas merokok
- D.
Mengurangi pabrik di perkotaan
Correct Answer
A. Membuat taman kotaExplanation
Membuat taman kota adalah usaha yang paling tepat untuk mengurangi pencemaran udara di perkotaan karena taman kota dapat berfungsi sebagai paru-paru hijau yang mampu menyerap polutan dan menghasilkan oksigen. Selain itu, taman kota juga dapat membantu menyejukkan suhu udara dan mengurangi polusi suara. Dengan adanya taman kota, masyarakat juga akan lebih tertarik untuk menghabiskan waktu di luar ruangan dan menggunakan kendaraan bermotor lebih sedikit, sehingga mengurangi emisi gas buang yang menyebabkan pencemaran udara.Rate this question:
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- 4.
Perhatikan tabel berikut! No Nama enzim Fungsi I Pepsin Mengubah protein menjadi pepton II Amilase Mengubah maltosa menjadi glukosa III Renin Menggumpalkan protein susu (kasein) IV Tripsin Mengubah protein menjadi asam amino Berdasarkan tabel di atas, nama enzim yang di hasilkan oleh pankreas beserta fungsinya adalah….
- A.
I dan II
- B.
I dan III
- C.
II dan III
- D.
II dan IV
Correct Answer
D. II dan IVExplanation
The correct answer is II and IV. This is because the table shows that Amilase is an enzyme that converts maltose into glucose, and Tripsin is an enzyme that converts protein into amino acids. Therefore, the enzymes produced by the pancreas and their functions are Amilase (II) and Tripsin (IV).Rate this question:
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- 5.
Perhatikan pernyataan di bawah ini. 1. penyaringan debu 2. penyesuaian suhu 3. pengatur kelembapan 4. pertukaran gas Perlakuan terhadap udara yang masuk dalam rongga hidung ditunjukkan oleh pernyataan ….
- A.
1, 2, dan 3
- B.
1, 2, dan 4
- C.
1, 3, dan 4
- D.
2, 3, dan 4
Correct Answer
A. 1, 2, dan 3Explanation
The correct answer is 1, 2, and 3. The statement mentions dust filtration, temperature adjustment, and humidity control as treatments for the air entering the nasal cavity. These three actions are part of the nose's function to condition and prepare the air before it reaches the lungs.Rate this question:
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- 6.
Apabila tubuh manusia terkena infeksi, maka bagian darah yang bekerja adalah…
- A.
Sel darah merah
- B.
Sel darah putih
- C.
Keping-keping darah
- D.
Plasma darah
Correct Answer
B. Sel darah putihExplanation
When the human body is infected, the part of the blood that works is the white blood cells. White blood cells are responsible for fighting off infections and foreign substances in the body. They play a crucial role in the immune response and help to prevent the spread of infection. Red blood cells carry oxygen to the body's tissues, platelets are involved in blood clotting, and plasma is the liquid component of blood that carries nutrients and hormones. However, in the context of an infection, it is the white blood cells that are primarily involved in the body's defense mechanism.Rate this question:
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- 7.
Proses yang terjadi pada tubulus distal adalah…
- A.
Filtrasi
- B.
Absorbsi
- C.
Reabsorbsi
- D.
Augmentasi
Correct Answer
D. AugmentasiExplanation
The process that occurs in the distal tubule is augmentation. Augmentation refers to the process of increasing the concentration of a substance in the urine by actively transporting ions or molecules from the blood into the tubule. This process helps in regulating the final composition and concentration of urine before it is excreted from the body.Rate this question:
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- 8.
Perhatikan gambar sistem reproduksi pada wanita berikut ini! Pada gambar tersebut bagian yang ditunjukkan oleh huruf X dan Y, berturut-turut berfungsi untuk….
- A.
Tempat pembentukan sel telur dan tempat proses fertilisasi
- B.
Tempat pembentukan sel telur dan tempat berkembangnya embrio
- C.
Tempat proses fertilisasi dan tempat berkembangnya embrio
- D.
Menangkap sel telur yang keluar dari ovarium dan tempat fertilisasi
Correct Answer
C. Tempat proses fertilisasi dan tempat berkembangnya embrioExplanation
The correct answer is "tempat proses fertilisasi dan tempat berkembangnya embrio". This is because the parts indicated by letters X and Y in the image are the fallopian tubes and the uterus, respectively. The fallopian tubes are responsible for the process of fertilization, where the sperm and egg meet, while the uterus is where the embryo develops and implants after fertilization.Rate this question:
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- 9.
Perhatikan gambar penampang daun dibawah ini! Bagian yang bertanda X berfungsi untuk…
- A.
Tempat terjadinya fotosintesis
- B.
Tempat pengangkutan hasil fotosintesis
- C.
Tempat keluar masuknya udara
- D.
Tempat pengangkutan air dan garam mineral
Correct Answer
C. Tempat keluar masuknya udaraExplanation
The X-marked part in the leaf section is responsible for the exchange of gases, specifically allowing the entry and exit of air. This is because the process of photosynthesis requires the intake of carbon dioxide and the release of oxygen. The exchange of gases occurs through small openings called stomata, which are present in the X-marked region of the leaf.Rate this question:
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- 10.
Perhatikan gambar berikut ! Berdasarkan percobaan di atas, tujuan dari langkah 3 adalah…
- A.
Mematikan sel-sel dari daun
- B.
Membuktikan adanya amilum
- C.
Melarutkan amilum pada daun
- D.
Melarutkan klorofil pada daun
Correct Answer
D. Melarutkan klorofil pada daunExplanation
Langkah 3 bertujuan untuk melarutkan klorofil pada daun. Hal ini dapat diketahui dari gambar yang menunjukkan daun yang telah dipanaskan dan direndam dalam alkohol. Alkohol berfungsi untuk melarutkan klorofil dalam daun, sehingga warna hijau dari klorofil akan hilang. Dengan demikian, tujuan dari langkah 3 adalah untuk melarutkan klorofil pada daun.Rate this question:
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- 11.
Apabila disamping tanaman pare ditancapkan sebatang kayu maka arah gerak batangnya adalah …
- A.
Menuju kebatang kayu tapi tidak melekat
- B.
Mendekat kebatang kayu dan melilit
- C.
Membelok menjauhui batang kayu
- D.
Tetap tumbuh menuju kearah atas
Correct Answer
B. Mendekat kebatang kayu dan melilitExplanation
When a stick is inserted next to a bitter melon plant, the plant's stem will move towards the stick and wrap around it. This is a common behavior known as thigmotropism, where plants respond to touch or physical contact by growing or bending towards the object. In this case, the bitter melon plant is exhibiting positive thigmotropism by moving closer to the stick and winding around it.Rate this question:
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- 12.
Anak rayap membutuhkan flagellata untuk membantu proses pencernaan selullosa dalam tubuhnya dengan cara ….
- A.
Memakan kulit tubuh induknya
- B.
Memakan kelupasan kulitnya
- C.
Menjilati dubur induknya
- D.
Menjilati permukaan tubuhnya
Correct Answer
C. Menjilati dubur induknyaExplanation
The correct answer is "menjilati dubur induknya." Termites rely on flagellates, a type of microorganism, to help them digest cellulose in their bodies. These flagellates live in the hindgut of the termite, specifically in the hindgut paunch. The termite then consumes its own feces, which contain the flagellates, in order to reintroduce them into its digestive system. By licking the anus of its parent, a young termite can acquire the necessary flagellates to aid in its own digestion.Rate this question:
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- 13.
Persilangan tanaman belimbing berbuah banyak, rasa manis (BbMm) dengan tanaman belimbing berbuah sedikit, rasa asam (bbmm), persentase kemungkinan diperoleh tanaman belimbing berbuah banyak, rasa asam sebanyak ...
- A.
25 %
- B.
50 %
- C.
75 %
- D.
100 %
Correct Answer
A. 25 %Explanation
The given question is asking for the percentage of the possibility of obtaining a starfruit plant that bears many fruits and has a sour taste. The traits for bearing many fruits are represented by the genotype BbMm, while the traits for a sour taste are represented by the genotype bbmm. When these two plants are crossed, the possible genotypes of the offspring are Bbmm and bbMm. Since both genotypes have the trait for a sour taste, the percentage of obtaining a starfruit plant with a sour taste is 100%. However, only one of the possible genotypes (Bbmm) has the trait for bearing many fruits, so the percentage of obtaining a starfruit plant that bears many fruits and has a sour taste is 25%.Rate this question:
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- 14.
Perhatikan beberapa produk bioteknologi berikut ! 1. vaksin 2. tablet/cairan klorofil 3. penisilin 4 protein sel tunggal 5. insulin Produk bioteknologi yang dimanfaatkan dalam bidang kesehatan adalah …
- A.
1, 2, dan 4
- B.
1, 3, dan 5
- C.
2, 3, dan 4
- D.
3, 4, dan 5
Correct Answer
B. 1, 3, dan 5Explanation
The correct answer is 1, 3, and 5 because vaccines, penicillin, and insulin are all biotechnology products used in the field of health. Vaccines are used to prevent diseases by stimulating the immune system to produce antibodies. Penicillin is an antibiotic used to treat bacterial infections. Insulin is a hormone used to regulate blood sugar levels in people with diabetes.Rate this question:
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- 15.
Perhatikan gambar tehnik stek di bawah ini! Bentuk bidang potong seperti gambar di atas bertujuan untuk ....
- A.
Memudahkan proses penanaman
- B.
Memperkokoh tanaman yang ditanam
- C.
Memilih batang yang akan ditanam
- D.
Memperluas bidang tumbuhnya akar
Correct Answer
D. Memperluas bidang tumbuhnya akarExplanation
The given correct answer, "memperluas bidang tumbuhnya akar" (expanding the root growth area), is supported by the image of the staking technique shown. The shape of the cut area allows for the roots to spread outwards, providing more space for growth. This technique is commonly used to encourage the development of a strong and extensive root system in plants.Rate this question:
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