उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

Which codon signals the start of translation in most genes?

1. AUAA
2. BAUG
3. CUGA
4. DUAG

What is the job of the capsule found around some bacteria?

1. AIt helps the bacterium make energy by photosynthesis
2. BIt is used to swim through liquids
3. CIt protects the cell, for example from white blood cells
4. DIt holds the bacterium's main chromosome

What is the pH of pure water at 25 °C?

1. A14
2. B7
3. C0
4. D1

Why do the palisade cells near the top surface of a leaf contain many chloroplasts?

1. AThey get the most light and do most of the photosynthesis
2. BThey protect the leaf from insects and strong winds
3. CThey carry sugars from the leaves down to the roots
4. DThey store most of the plant's water for dry periods

In which part of the chloroplast do the light-dependent reactions happen?

1. AIn the cell wall
2. BIn the thylakoid membranes
3. CIn the stroma
4. DIn the outer membrane

What does the enzyme lipase break down?

1. AProteins into amino acids and peptides
2. BStarch into sugars
3. CDNA into nucleotides
4. DFats into fatty acids and glycerol

Parts of a protein chain coil into alpha helices and fold into beta sheets, held by hydrogen bonds. Which level of protein structure is this?

1. AQuaternary structure
2. BSecondary structure
3. CPrimary structure
4. DTertiary structure

A linear DNA molecule is fully cut by a restriction enzyme, giving fragments of 500, 300 and 200 base pairs. How long was the original molecule?

1. A1500 base pairs
2. B300 base pairs
3. C1000 base pairs
4. D500 base pairs