Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

What does the enzyme DNA ligase do?

1. AIt cuts DNA at specific sites
2. BIt joins pieces of DNA together
3. CIt unwinds the DNA double helix
4. DIt makes RNA from a DNA template

Which protein gives strength to skin, tendons and bone?

1. ACollagen
2. BMyosin
3. CHaemoglobin
4. DAmylase

Organel mana yang menghasilkan sebagian besar ATP dalam sel eukariot?

1. ARibosom
2. BMitokondria
3. CLisosom
4. DBadan Golgi

Where does the Krebs (citric acid) cycle take place in a eukaryotic cell?

1. AIn the mitochondrial matrix
2. BIn the nucleus
3. COn the rough endoplasmic reticulum
4. DIn the cytoplasm

During which division of meiosis do homologous chromosomes separate?

1. AMeiosis I
2. BNeither, because they separate in mitosis
3. CMeiosis II
4. DBoth meiosis I and meiosis II

Why is a buffer system important in blood?

1. AIt resists changes in pH
2. BIt carries oxygen to the tissues
3. CIt makes the blood clot faster
4. DIt raises the blood glucose level

Satu bakteri membelah setiap 20 menit. Jika tidak ada yang mati, berapa jumlah bakteri setelah 2 jam?

1. A128
2. B32
3. C12
4. D64

In the Hershey–Chase experiment, viruses were labelled with radioactive phosphorus in their DNA or radioactive sulfur in their protein. Only the phosphorus entered the infected bacteria. What did this show?

1. AViruses contain no DNA at all
2. BDNA, not protein, is the genetic material of the virus
3. CProtein, not DNA, is the genetic material of the virus
4. DBacteria take up any radioactive substance