1. Which of the following is the appropriate threshold value for mammalian neurons?

o -80 Mv

o -55 mV

o 0 mV

o +35 mV

2. In a certain plant, red flowers are dominant over white flowers. A plant heterozygous

for red flowers and a plant with white flowers are crossed. Which of the following is

the expected proportion of phenotypes in the next generation?

o 2 red, 2 white

o 4 red, 0 white

o 3 red, 1 white

o 1 red, 3 white

3. Which of the following structures is present in both prokarayotic cells?

o Endoplasmic reticulum

o Cell membrane

o Chloroplast

o Golgi apparatus

4. Which of the following can lead to a tsunami?

o Sunspot activity

o Lightning strikes

lOMoAR cPSD|8510046

o Flooding

o Earthquakes

5. Which of the following are used to determine a person’s DNA sequence?

o Genes

o Blood type

o Hormones

o Enzymes

6. Which of the following organic molecules contain both an amine and carboxyl group?

o Lipids

o Chitin

o Cellulose

o Proteins

7. Osteoporosis results from which of the following

o A decline in osteoclast activity while osteoblast activity continues at expected levels

o An increase in osteocyte activity while osteoblast activity continues at expected levels

o A decline in osteoblast activity while osteoblast activity continues at expected levels

o An increase in osteocyte while activity continues at expected levels.

8. Which of the following is released by one type of immune cell to directly activate

type of immune cell?

o Lysozymes

o Perforin

o Cytokines