Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

What is the main job of the cell wall in a plant cell?

1. ATo control which genes are switched on in the nucleus
2. BTo support the cell and stop it from bursting
3. CTo make proteins for the cell
4. DTo release energy from glucose

What is true of a recessive allele?

1. AIts trait shows whenever one copy is present
2. BIts trait shows only when two copies are present
3. CIt is found only on the X chromosome
4. DIt is always harmful to the organism

What does it mean that a cell membrane is selectively permeable?

1. AIt lets some substances cross but not others
2. BIt lets every substance cross freely in both directions
3. CIt lets no substance cross at all
4. DIt lets only water molecules cross

Which statement about identical and non-identical twins is correct?

1. ANon-identical twins come from one zygote that splits in two
2. BBoth kinds of twin always share all of their genes
3. CIdentical twins come from one zygote; non-identical twins come from two
4. DIdentical twins come from two eggs that are fertilised by a single sperm

Why is water good at dissolving salts and sugars?

1. AIt has a very low boiling point
2. BIts molecules are nonpolar
3. CIts molecules are polar
4. DIt contains carbon atoms

The sodium-potassium pump moves ions across the cell membrane. What does one cycle of the pump do?

1. AMoves 2 Na⁺ out and 3 K⁺ in, using ATP
2. BMoves 3 K⁺ out and 2 Na⁺ in, using ATP
3. CMoves 3 Na⁺ out and 2 K⁺ in, using ATP
4. DMoves Na⁺ in and K⁺ out, without using ATP

A plant that is AaBb is crossed with an AaBB plant. A and B are dominant, and the genes assort independently. What fraction of the offspring show both dominant traits?

1. A3/4
2. B9/16
3. C1/4
4. D1/2

Sebuah sel darah merah ditempatkan dalam larutan dengan konsentrasi zat terlarut yang sama dengan sitoplasmanya. Apa yang terjadi?

1. ASel mengkerut karena air keluar
2. BTidak ada perpindahan air bersih; sel mempertahankan bentuknya
3. CMolekul air berhenti melintasi membran ke kedua arah
4. DSel membengkak dan pecah