Answer the following statements true (T) or false (F)
1. Plants are unable to use nitrogen gas directly.
2. Nitrate reductase is an enzyme that changes nitrogen gas into nitrate.
3. When stomata are closed plants CANNOT absorb CO2, therefore photosynthesis is limited.
4. Nitrogen is especially important in plants for the formation of proteins.
5. Certain fungi help make available minerals such as nitrogen.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. FALSE
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An atom has 20 electrons and 20 neutrons. What is the mass of this atom?
A. 10 B. 20 C. 40 D. 80
BRCA2 maps to the long arm of chromosome 13 and may be responsible for the majority of inherited predispositions for breast cancer not caused by ____________________
Fill in the blank(s) with correct word
Why does blood move slower in the capillaries compared to the arterioles?
A. Precapillary sphincters close shunting blood into capillaries. B. Capillaries are present in muscles while arterioles are not. C. There are many more capillaries than arterioles. D. Blood pressure is much higher in capillaries than in arterioles. E. Capillaries are much wider than arterioles.
In the eukaryotic promoters that have it, the CAAT box appears to be critical to the promoter's ability to facilitate transcription
Indicate whether the statement is true or false